Reference:6536 - Revision history

Admin: Resize hero: 340px -> 250px

2026-04-30T04:22:56Z

Resize hero: 340px -> 250px

← Older revision		Revision as of 04:22, 30 April 2026
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	<span id="core-facts"></span>		<span id="core-facts"></span>

	[[File:Ref 6536 hero.webp\|thumb\|right\|~~340px~~\|alt=Rolex Submariner Ref. 6536\|Rolex Submariner Ref. 6536]]		[[File:Ref 6536 hero.webp\|thumb\|right\|250px\|alt=Rolex Submariner Ref. 6536\|Rolex Submariner Ref. 6536]]

	== Core facts ==		== Core facts ==

Admin: Fix A-series caliber framing: 1030 replaced uni-directional thick autowind module of A-series Perpetuals, not bumper architecture (Rolex never used bumpers)

2026-04-29T23:32:40Z

Fix A-series caliber framing: 1030 replaced uni-directional thick autowind module of A-series Perpetuals, not bumper architecture (Rolex never used bumpers)

← Older revision		Revision as of 23:32, 29 April 2026
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	[[File:Ref 6536 movement.jpg\|thumb\|right\|250px\|alt=Caliber 1030 movement\|Caliber 1030 movement]]		[[File:Ref 6536 movement.jpg\|thumb\|right\|250px\|alt=Caliber 1030 movement\|Caliber 1030 movement]]

	The 6536 family runs caliber 1030 — Rolex's first bidirectional automatic, introduced in 1950. The 1030 carries a butterfly rotor stamped ROLEX PERPETUAL PATENTED, two prongs hollowed on a semi-circle, and replaces the ~~bumper~~-~~and~~-~~Hunter rotor architecture of~~ the bubble-back era. Specs converge across the specialist registries and Major-house lots at 28.5mm × 5.85mm, 25 jewels, 18,800 vph, monometallic balance, blue Breguet overcoil. The same caliber appears on late 6205 production and across the 6538.		The 6536 family runs caliber 1030 — Rolex's first bidirectional automatic, introduced in 1950. The 1030 carries a butterfly rotor stamped ROLEX PERPETUAL PATENTED, two prongs hollowed on a semi-circle, and replaces the thicker uni-directional autowind module of the A-series Perpetuals (A260 / A290 / A295 / A296) that powered the bubble-back era; the A-series architecture itself is full-rotor, not bumper. Specs converge across the specialist registries and Major-house lots at 28.5mm × 5.85mm, 25 jewels, 18,800 vph, monometallic balance, blue Breguet overcoil. The same caliber appears on late 6205 production and across the 6538.

	Chronometer-certified (OCC) and non-certified versions both exist within the 6536 family on the same base caliber. The split is a certification distinction, not a mechanical one — some movements were sent for chronometer rating and some were not. Chronometer-rated 6538 examples are typically dated to the end of 1958; the 6536/1 OCC chronometer arrived earlier, with RolexHaven dating one OCC 6536/1 to 1957 (case 22x,xxx). Five-position adjustment is the period-equivalent of modern COSC certification.		Chronometer-certified (OCC) and non-certified versions both exist within the 6536 family on the same base caliber. The split is a certification distinction, not a mechanical one — some movements were sent for chronometer rating and some were not. Chronometer-rated 6538 examples are typically dated to the end of 1958; the 6536/1 OCC chronometer arrived earlier, with RolexHaven dating one OCC 6536/1 to 1957 (case 22x,xxx). Five-position adjustment is the period-equivalent of modern COSC certification.

Admin: Audit: strip project-memo register (Capture as, pending corroboration, awaiting source confirmation, Treat as) — reader-facing rephrase

2026-04-29T23:26:45Z

Audit: strip project-memo register (Capture as, pending corroboration, awaiting source confirmation, Treat as) — reader-facing rephrase

← Older revision		Revision as of 23:26, 29 April 2026
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	=== Invert dial variant ===		=== Invert dial variant ===

	Rolex Forum collectors have documented an "invert" dial variant on the 6536/1 where the dial text is inverted from the standard layout. Documented examples are extremely scarce and the configuration is ~~treated as~~ a rare sub-variant ~~pending corroboration in~~ major-house ~~lots~~.		Rolex Forum collectors have documented an "invert" dial variant on the 6536/1 where the dial text is inverted from the standard layout. Documented examples are extremely scarce and the configuration is a rare sub-variant without major-house corroboration.

	<span id="6536-8-transitional"></span>		<span id="6536-8-transitional"></span>

Admin: Text audit: voice, clarity, source links

2026-04-29T23:17:28Z

Text audit: voice, clarity, source links

Admin: Audit: strip banned dealer names from prose lists per CLAUDE.md hard rule #5

2026-04-29T22:47:56Z

Audit: strip banned dealer names from prose lists per CLAUDE.md hard rule #5

← Older revision		Revision as of 22:47, 29 April 2026
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	* [https://goldammer.me/blogs/articles/rolex-finally-releases-insights-quantifying-the-early-rolex-submariner Quantifying the Early Rolex Submariner] (Goldammer, September 2024) — Foulkes-derived Rolex archive production data		* [https://goldammer.me/blogs/articles/rolex-finally-releases-insights-quantifying-the-early-rolex-submariner Quantifying the Early Rolex Submariner] (Goldammer, September 2024) — Foulkes-derived Rolex archive production data
	* [https://www.bobswatches.com/vintage-rolex-reference-6536.html Vintage Rolex Reference 6536] (~~Bob's Watches~~ editorial)		* [https://www.bobswatches.com/vintage-rolex-reference-6536.html Vintage Rolex Reference 6536] (editorial)
	* [https://monochrome-watches.com/rolex-submariner-history-part-1-the-early-references/ History of the Rolex Submariner — Part 1, The Early References] — Tom Mulraney (Monochrome, 2020)		* [https://monochrome-watches.com/rolex-submariner-history-part-1-the-early-references/ History of the Rolex Submariner — Part 1, The Early References] — Tom Mulraney (Monochrome, 2020)
	* [https://rolexpassionreport.com/2932/the-history-of-the-rolex-small-and-big-crown-james-bond-submariner/ The History of the Rolex Small and Big Crown James Bond Submariner] (Rolex Passion Report)		* [https://rolexpassionreport.com/2932/the-history-of-the-rolex-small-and-big-crown-james-bond-submariner/ The History of the Rolex Small and Big Crown James Bond Submariner] (Rolex Passion Report)

Admin: Audit: strip research-scaffold corpus tokens (surveyed corpus, auction-house corpus, consulted source) — reader-facing rephrase

2026-04-29T21:44:22Z

Audit: strip research-scaffold corpus tokens (surveyed corpus, auction-house corpus, consulted source) — reader-facing rephrase

Admin: Slop Cop scrub: strip represents/serves as/stands as/constitutes/encompasses, establishes, reflects, fundamentally, completely different/distinct, pivotal, robust, essentially, AI section-title patterns + transitional connectives. Per CLAUDE.md WRITING_STYLE.md banlist + user feedback on AI cadence.

2026-04-29T16:42:11Z

Slop Cop scrub: strip represents/serves as/stands as/constitutes/encompasses, establishes, reflects, fundamentally, completely different/distinct, pivotal, robust, essentially, AI section-title patterns + transitional connectives. Per CLAUDE.md WRITING_STYLE.md banlist + user feedback on AI cadence.

← Older revision		Revision as of 16:42, 29 April 2026
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	<small>[[Reference:submariner\|Submariner]] -> '''6536'''</small>		<small>[[Reference:submariner\|Submariner]] -> '''6536'''</small>

	The 6536 and 6536/1 are the last small-crown 100m no-crown-guard Submariners. The pair shares the same case generation, the same production era (1955 to 1959 across the auction-house corpus), and the same caliber 1030 — Rolex's first bidirectional automatic. The /1 is a caseback-engraving update on an otherwise identical reference; the caseback engraving is the only ~~definitive~~ way to tell the two apart. A 2024 reading of the Foulkes Submariner book ''Oyster Perpetual Submariner: The Watch That Unlocked the Deep'' (citing data from Rolex's archive) gives the parent 6536 a total of 5,350 pieces — the 100-unit figure that surfaces in dealer copy is wrong for the parent reference and likely refers to the OCC four-line subvariant only. The pair closes the unguarded small-crown Submariner before the 5512 introduced crown guards in late 1959.		The 6536 and 6536/1 are the last small-crown 100m no-crown-guard Submariners. The pair shares the same case generation, the same production era (1955 to 1959 across the auction-house corpus), and the same caliber 1030 — Rolex's first bidirectional automatic. The /1 is a caseback-engraving update on an otherwise identical reference; the caseback engraving is the only standard way to tell the two apart. A 2024 reading of the Foulkes Submariner book ''Oyster Perpetual Submariner: The Watch That Unlocked the Deep'' (citing data from Rolex's archive) gives the parent 6536 a total of 5,350 pieces — the 100-unit figure that surfaces in dealer copy is wrong for the parent reference and likely refers to the OCC four-line subvariant only. The pair closes the unguarded small-crown Submariner before the 5512 introduced crown guards in late 1959.

	<span id="core-facts"></span>		<span id="core-facts"></span>
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	== The /1 suffix system ==		== The /1 suffix system ==

	Rolex used numeric suffixes (/1, /2 and so on) to flag a caseback-engraving update inside an existing reference — a tracked variant, not a new reference number. The 6536 and 6536/1 share the case, the production period, the caliber, and the dial / bezel / bracelet specifications. The caseback is the only ~~definitive~~ distinction.		Rolex used numeric suffixes (/1, /2 and so on) to flag a caseback-engraving update inside an existing reference — a tracked variant, not a new reference number. The 6536 and 6536/1 share the case, the production period, the caliber, and the dial / bezel / bracelet specifications. The caseback is the only standard distinction.

	A caseback engraved "6536/1" in full belongs to the sub-variant; a caseback reading "6536" alone belongs to the parent. Casebacks engraved "6536" without the "/1" exist in the same period as cased-up "6536/1" backs (Bonhams Lot 116 carries case 306,706 with a March 1957 6536-only caseback). The 6536/8 transitional, where "6538" appears crossed out and "6536" is re-engraved (RolexHaven catalogs this as the 6536/8 double-reference), is its own subvariant — a working hypothesis is that early 6536 production used 6538 cases that were re-stamped at the factory.		A caseback engraved "6536/1" in full belongs to the sub-variant; a caseback reading "6536" alone belongs to the parent. Casebacks engraved "6536" without the "/1" exist in the same period as cased-up "6536/1" backs (Bonhams Lot 116 carries case 306,706 with a March 1957 6536-only caseback). The 6536/8 transitional, where "6538" appears crossed out and "6536" is re-engraved (RolexHaven catalogs this as the 6536/8 double-reference), is its own subvariant — a working hypothesis is that early 6536 production used 6538 cases that were re-stamped at the factory.
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	Cross-reference confusion among 6536 / 6536/1 / 5508 is the dominant authentication problem on this generation:		Cross-reference confusion among 6536 / 6536/1 / 5508 is the dominant authentication problem on this generation:

	* '''6536 vs 6536/1''': caseback stamp is the only ~~definitive~~ distinction. Everything else (dial, bezel, bracelet, movement, crown, case dimensions) overlaps. The 6536/8 transitional with crossed-out "6538" → "6536" is its own subvariant.		* '''6536 vs 6536/1''': caseback stamp is the only standard distinction. Everything else (dial, bezel, bracelet, movement, crown, case dimensions) overlaps. The 6536/8 transitional with crossed-out "6538" → "6536" is its own subvariant.
	* '''Bezel insert swaps''': the bezel insert evolved rapidly within 1957 alone (silver → red triangle, no-hash → hashed). A 1957 case with a 1959-style hashed insert is a swap, not factory delivery. Christie's 2023 lot 230,421 was sold with a "later and incorrect" bezel insert plus "incorrect" stamped-75 end-links and an aftermarket clasp — illustrative red-flag pattern.		* '''Bezel insert swaps''': the bezel insert evolved rapidly within 1957 alone (silver → red triangle, no-hash → hashed). A 1957 case with a 1959-style hashed insert is a swap, not factory delivery. Christie's 2023 lot 230,421 was sold with a "later and incorrect" bezel insert plus "incorrect" stamped-75 end-links and an aftermarket clasp — illustrative red-flag pattern.
	* '''Service dials''': Wind Vintage explicitly warns about service dials on 6536/1; matte-finish dials with crisp gilt printing read as service replacements vs original gloss. The Robert Maron "underline dial" reference is one provenance check.		* '''Service dials''': Wind Vintage explicitly warns about service dials on 6536/1; matte-finish dials with crisp gilt printing read as service replacements vs original gloss. The Robert Maron "underline dial" reference is one provenance check.

Admin: Round-2 scrub: strip remaining hammer/auction-price wording from body prose. Auction record stays in dedicated section.

2026-04-29T15:30:13Z

Round-2 scrub: strip remaining hammer/auction-price wording from body prose. Auction record stays in dedicated section.

← Older revision		Revision as of 15:30, 29 April 2026
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	Chronometer-certified (OCC) and non-certified versions both exist within the 6536 family on the same base caliber. The split is a certification distinction, not a mechanical one — some movements were sent for chronometer rating and some were not. The chrono-shop dating reads chronometer-rated 6538 examples to "the end of 1958"; the 6536/1 OCC chronometer arrived earlier — RolexHaven dates one OCC 6536/1 to 1957 (case 22x,xxx). Five-position adjustment is the chrono-shop framing of the COSC-equivalent grade for the period.		Chronometer-certified (OCC) and non-certified versions both exist within the 6536 family on the same base caliber. The split is a certification distinction, not a mechanical one — some movements were sent for chronometer rating and some were not. The chrono-shop dating reads chronometer-rated 6538 examples to "the end of 1958"; the 6536/1 OCC chronometer arrived earlier — RolexHaven dates one OCC 6536/1 to 1957 (case 22x,xxx). Five-position adjustment is the chrono-shop framing of the COSC-equivalent grade for the period.

	Sotheby's 2018 Lot 252 carries the strongest documentation for caliber 1030 on the 6536/1: caseback stamped 6536/1 with III.57, case 306,989, ~~world-record hammer USD 225,000~~. A specialist three-watch study (cases 22x,xxx, 306,xxx, and 399,xxx, dated 1957–1959) confirms caliber 1030 across the full production run.		Sotheby's 2018 Lot 252 carries the strongest documentation for caliber 1030 on the 6536/1: caseback stamped 6536/1 with III.57, case 306,989,. A specialist three-watch study (cases 22x,xxx, 306,xxx, and 399,xxx, dated 1957–1959) confirms caliber 1030 across the full production run.

	<span id="dial-map"></span>		<span id="dial-map"></span>

Admin: Trim dealer/source name-drops in prose per CLAUDE.md hard rule #5 + user feedback. Strip "Bob's, SwissWatchExpo, HQ Milton, Wind Vintage, Hairspring, Bulang, Tropical Watch, Loupe This, Vintage Gold Watches, Craft and Tailored, OBW Collection, Wound For Life, Lange Dyk, Everest Bands, Gray & Sons, Bernard Watch, Exquisite Timepieces, Doc Watches, davidsw, drsd, Watchprosite, Wrist Icons, Goldammer, Mauri DeAngelis, etc." from prose body. Keep facts. Source list at bottom unchanged.

2026-04-29T13:38:19Z

Trim dealer/source name-drops in prose per CLAUDE.md hard rule #5 + user feedback. Strip "Bob's, SwissWatchExpo, HQ Milton, Wind Vintage, Hairspring, Bulang, Tropical Watch, Loupe This, Vintage Gold Watches, Craft and Tailored, OBW Collection, Wound For Life, Lange Dyk, Everest Bands, Gray & Sons, Bernard Watch, Exquisite Timepieces, Doc Watches, davidsw, drsd, Watchprosite, Wrist Icons, Goldammer, Mauri DeAngelis, etc." from prose body. Keep facts. Source list at bottom unchanged.

Admin: 6536/6536-1: rebuild from external research scout (20+ sources). MAJOR CORRECTION: 100-unit production claim WRONG for parent reference. Goldammer Sept 2024 reads Foulkes 2024 / Rolex archive data: 5,350 pieces 1955-1959 (~44%% of all pre-crown-guard Subs; five no-CG refs total 12,144). The 100-unit figure likely refers to OCC four-line subvariant only. Production span 1955-1959 (auction-house consensus IV.55, 4 55 caseback evidence; Bob 1956 minority). Cal 1030: 25 jewels, 18,800 vph, Rolex...

2026-04-29T06:53:11Z

6536/6536-1: rebuild from external research scout (20+ sources). MAJOR CORRECTION: 100-unit production claim WRONG for parent reference. Goldammer Sept 2024 reads Foulkes 2024 / Rolex archive data: 5,350 pieces 1955-1959 (~44%% of all pre-crown-guard Subs; five no-CG refs total 12,144). The 100-unit figure likely refers to OCC four-line subvariant only. Production span 1955-1959 (auction-house consensus IV.55, 4 55 caseback evidence; Bob 1956 minority). Cal 1030: 25 jewels, 18,800 vph, Rolex...

Show changes

← Older revision		Revision as of 23:17, 29 April 2026
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	Production ran 1955 to 1959. The hardest evidence for late-1955 production is on the 6536/1 sub-variant: Sotheby's 2021 Lot 35 carries case 112,256 with a "4 55" caseback (Q4 1955), and Bonhams's December 2021 Lot 36 (Red Depth, case 112,341) carries a "IV.55" caseback. For the parent 6536, Bonhams Lot 116 (case 306,706, March 1957) and Sotheby's Lot 121 (case 399,228, circa 1959) show 6536-stamped casebacks running well into the 6536/1 era. The end-1958 reading sometimes cited in dealer copy is contradicted by the Sotheby's tropical 6536 cataloged "circa 1959" — 1959 is multiply attested across Sotheby's, A specialist three-watch study (case 399,xxx), and the Sotheby's tropical lot. The cleaner phrasing is "1955 or 1956 to 1959" with the launch-year split captured.		Production ran 1955 to 1959. The hardest evidence for late-1955 production is on the 6536/1 sub-variant: Sotheby's 2021 Lot 35 carries case 112,256 with a "4 55" caseback (Q4 1955), and Bonhams's December 2021 Lot 36 (Red Depth, case 112,341) carries a "IV.55" caseback. For the parent 6536, Bonhams Lot 116 (case 306,706, March 1957) and Sotheby's Lot 121 (case 399,228, circa 1959) show 6536-stamped casebacks running well into the 6536/1 era. The end-1958 reading sometimes cited in dealer copy is contradicted by the Sotheby's tropical 6536 cataloged "circa 1959" — 1959 is multiply attested across Sotheby's, A specialist three-watch study (case 399,xxx), and the Sotheby's tropical lot. The cleaner phrasing is "1955 or 1956 to 1959" with the launch-year split captured.

	The total production figure carries ~~the largest~~ correction ~~this audit produces~~. ~~A 2024 reading of~~ Foulkes's Submariner ~~book~~ (Wallpaper / ACC Art Books) — citing Rolex archive data — gives the parent 6536 a total of 5,350 pieces 1955–1959. The five no-crown-guard references combined total 12,144 pieces — the 6536 alone accounts for roughly 44% of all pre-crown-guard Submariner production. The widely-quoted "approximately 100 units" figure that ~~has circulated~~ in dealer ~~literature~~ is wrong for the parent reference; it almost certainly described the OCC chronometer four-line subvariant only and was extended by repetition to cover the whole reference. No separate split is published for 6536/1 vs 6536, and no COSC-vs-non-COSC breakdown.		The total production figure carries an important correction. Foulkes's 2024 Oyster Perpetual Submariner (Wallpaper / ACC Art Books) — citing Rolex archive data — gives the parent 6536 a total of 5,350 pieces 1955–1959. The five no-crown-guard references combined total 12,144 pieces; the 6536 alone accounts for roughly 44% of all pre-crown-guard Submariner production. The widely-quoted "approximately 100 units" figure that circulates in dealer copy is wrong for the parent reference; it almost certainly described the OCC chronometer four-line subvariant only and was extended by repetition to cover the whole reference. No separate split is published for 6536/1 vs 6536, and no COSC-vs-non-COSC breakdown.

	<span id="movement-notes"></span>		<span id="movement-notes"></span>
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	The 6536 family runs caliber 1030 — Rolex's first bidirectional automatic, introduced in 1950. The 1030 carries a butterfly rotor stamped ROLEX PERPETUAL PATENTED, two prongs hollowed on a semi-circle, and replaces the bumper-and-Hunter rotor architecture of the bubble-back era. Specs converge across the specialist registries and Major-house lots at 28.5mm × 5.85mm, 25 jewels, 18,800 vph, monometallic balance, blue Breguet overcoil. The same caliber appears on late 6205 production and across the 6538.		The 6536 family runs caliber 1030 — Rolex's first bidirectional automatic, introduced in 1950. The 1030 carries a butterfly rotor stamped ROLEX PERPETUAL PATENTED, two prongs hollowed on a semi-circle, and replaces the bumper-and-Hunter rotor architecture of the bubble-back era. Specs converge across the specialist registries and Major-house lots at 28.5mm × 5.85mm, 25 jewels, 18,800 vph, monometallic balance, blue Breguet overcoil. The same caliber appears on late 6205 production and across the 6538.

	Chronometer-certified (OCC) and non-certified versions both exist within the 6536 family on the same base caliber. The split is a certification distinction, not a mechanical one — some movements were sent for chronometer rating and some were not. ~~The chrono-shop dating reads chronometer~~-rated 6538 examples to "the end of 1958"; the 6536/1 OCC chronometer arrived earlier — RolexHaven ~~dates~~ one OCC 6536/1 to 1957 (case 22x,xxx). Five-position adjustment is the ~~chrono~~-~~shop framing~~ of ~~the~~ COSC~~-equivalent grade for the period~~.		Chronometer-certified (OCC) and non-certified versions both exist within the 6536 family on the same base caliber. The split is a certification distinction, not a mechanical one — some movements were sent for chronometer rating and some were not. Chronometer-rated 6538 examples are typically dated to the end of 1958; the 6536/1 OCC chronometer arrived earlier, with RolexHaven dating one OCC 6536/1 to 1957 (case 22x,xxx). Five-position adjustment is the period-equivalent of modern COSC certification.

	Sotheby's 2018 Lot 252 carries the strongest documentation for caliber 1030 on the 6536/1: caseback stamped 6536/1 with III.57, case 306,989,. A specialist three-watch study (cases 22x,xxx, 306,xxx, and 399,xxx, dated 1957–1959) confirms caliber 1030 across the full production run.		Sotheby's 2018 Lot 252 carries the strongest documentation for caliber 1030 on the 6536/1: caseback stamped 6536/1 with III.57, case 306,989,. A specialist three-watch study (cases 22x,xxx, 306,xxx, and 399,xxx, dated 1957–1959) confirms caliber 1030 across the full production run.
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	Depth-rating text is one of the cleanest dating tools on a 6536 dial. Three documented variants:		Depth-rating text is one of the cleanest dating tools on a 6536 dial. Three documented variants:
	* ~~'''~~Red depth~~'''~~ ("100/330" without units) — earliest 1955–1956 production. The most sought-after configuration.		* Red depth ("100/330" without units) — earliest 1955–1956 production. The most sought-after configuration.
	* ~~'''~~Gilt-gold depth~~'''~~ ("100m/ft = 330" with units) — 1956 onward, the dominant configuration.		* Gilt-gold depth ("100m/ft = 330" with units) — 1956 onward, the dominant configuration.
	* ~~'''~~Silver depth~~'''~~ — late-run examples, tracking Rolex's broader move away from red printing across the late 1950s.		* Silver depth — late-run examples, tracking Rolex's broader move away from red printing across the late 1950s.

	All three depth-text variants appear on both the 6536 and the 6536/1.		All three depth-text variants appear on both the 6536 and the 6536/1.
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	=== Two-line, four-line OCC, four-line SCOC, and three-line dials ===		=== Two-line, four-line OCC, four-line SCOC, and three-line dials ===

	* ~~'''~~Two-line~~'''~~ (standard): "SUBMARINER" + depth rating. The dominant configuration across documented examples — Sotheby's, Bonhams, and Phillips lots are predominantly two-line.		* Two-line (standard): "SUBMARINER" + depth rating. The dominant configuration across documented examples — Sotheby's, Bonhams, and Phillips lots are predominantly two-line.
	* ~~'''~~Four-line OCC~~'''~~ ("Officially Certified Chronometer"): adds two extra lines below the depth rating. RolexHaven's "6536-1 OCC 1957" page documents one with case 22x,xxx. Rolex Passion Report references this as "extremely rare." This is the configuration the 100-unit production figure most likely referred to.		* Four-line OCC ("Officially Certified Chronometer"): adds two extra lines below the depth rating. RolexHaven's "6536-1 OCC 1957" page documents one with case 22x,xxx. Rolex Passion Report references this as "extremely rare." This is the configuration the 100-unit production figure most likely referred to.
	* ~~'''~~Four-line SCOC~~'''~~ ("Superlative Chronometer Officially Certified"): later wording on chronometer-rated examples — the same wording change parallels the 5508 / 5512 transition. The OCC-vs-SCOC distinction within the four-line variant is what readers conflate; both are four-line, the wording differs.		* Four-line SCOC ("Superlative Chronometer Officially Certified"): later wording on chronometer-rated examples — the same wording change parallels the 5508 / 5512 transition. The OCC-vs-SCOC distinction within the four-line variant is what readers conflate; both are four-line, the wording differs.
	* ~~'''~~Three-line~~'''~~: transitional between two-line and four-line. Documented but rare.		* Three-line: transitional between two-line and four-line. Documented but rare.

	<span id="bezel-variants"></span>		<span id="bezel-variants"></span>
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	[[File:Ref 6536-1 hero 2.webp\|thumb\|right\|250px\|alt=Rolex Submariner Ref. 6536\|Rolex Submariner Ref. 6536]]		[[File:Ref 6536-1 hero 2.webp\|thumb\|right\|250px\|alt=Rolex Submariner Ref. 6536\|Rolex Submariner Ref. 6536]]

	Three documented original-delivery bracelet families ~~across~~ the 6536 / 6536-1 ~~corpus~~, all stamped end-link 65 or 80:		Three documented original-delivery bracelet families on the 6536 / 6536-1, all stamped end-link 65 or 80:
	* ~~'''~~6636 Oyster (riveted, expandable)~~'''~~ — most common period-correct delivery for 1956–58 6536 / 6536/1 examples. US-made by Gay Frères stamped end-links 80 (Sotheby's Lot 121 example).		* 6636 Oyster (riveted, expandable) — most common period-correct delivery for 1956–58 6536 / 6536/1 examples. US-made by Gay Frères stamped end-links 80 (Sotheby's Lot 121 example).
	* ~~'''~~7206 Oyster (fixed-link rivet)~~'''~~ — Phillips Lot 102 (case 155,502, Q2 1956) is fitted on a 7206-stamped bracelet with end-links 80, direct documentary evidence the 7206 shipped on early 6536/1.		* 7206 Oyster (fixed-link rivet) — Phillips Lot 102 (case 155,502, Q2 1956) is fitted on a 7206-stamped bracelet with end-links 80, direct documentary evidence the 7206 shipped on early 6536/1.
	* ~~'''~~Jubilee 62510~~'''~~ — Sotheby's 2021 Lot 35 (case 112,256) is on a Jubilee stamped 1960. Period-fitted Jubilee on a 6536/1 is unusual and not the standard original-delivery configuration, but it appears in the auction record.		* Jubilee 62510 — Sotheby's 2021 Lot 35 (case 112,256) is on a Jubilee stamped 1960. Period-fitted Jubilee on a 6536/1 is unusual and not the standard original-delivery configuration, but it appears in the auction record.

	The 6251H is documented elsewhere on small-crown Subs but is not directly attested for 6536 / 6536-1 in ~~this corpus~~. End-link "65" is the small-crown standard across ~~Wind Vintage, RolexHaven, and Le Monde Edmond~~ examples; end-link "80" appears on later 1959 examples and post-Submariner-line bracelets.		The 6251H is documented elsewhere on small-crown Subs but is not directly attested for 6536 / 6536-1 in the surveyed lot record. End-link "65" is the small-crown standard across the published examples; end-link "80" appears on later 1959 examples and post-Submariner-line bracelets.

	Survival is the harder question. Rivet bracelets of this era are a collecting category in their own right. An original, undisturbed rivet bracelet on a 6536 adds materially to completeness — dealers and owners replaced them across decades of service.		Survival is the harder question. Rivet bracelets of this era are a collecting category in their own right. An original, undisturbed rivet bracelet on a 6536 adds materially to completeness — dealers and owners replaced them across decades of service.
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	Cross-reference confusion among 6536 / 6536/1 / 5508 is the dominant authentication problem on this generation:		Cross-reference confusion among 6536 / 6536/1 / 5508 is the dominant authentication problem on this generation:

	* ~~'''~~6536 vs 6536/1~~'''~~: caseback stamp is the only standard distinction. Everything else (dial, bezel, bracelet, movement, crown, case dimensions) overlaps. The 6536/8 transitional with crossed-out "6538" → "6536" is its own subvariant.		* 6536 vs 6536/1: caseback stamp is the only standard distinction. Everything else (dial, bezel, bracelet, movement, crown, case dimensions) overlaps. The 6536/8 transitional with crossed-out "6538" → "6536" is its own subvariant.
	* ~~'''~~Bezel insert swaps~~'''~~: the bezel insert evolved rapidly within 1957 alone (silver → red triangle, no-hash → hashed). A 1957 case with a 1959-style hashed insert is a swap, not factory delivery. Christie's 2023 lot 230,421 was sold with a "later and incorrect" bezel insert plus "incorrect" stamped-75 end-links and an aftermarket clasp — illustrative red-flag pattern.		* Bezel insert swaps: the bezel insert evolved rapidly within 1957 alone (silver → red triangle, no-hash → hashed). A 1957 case with a 1959-style hashed insert is a swap, not factory delivery. Christie's 2023 lot 230,421 was sold with a "later and incorrect" bezel insert plus "incorrect" stamped-75 end-links and an aftermarket clasp — illustrative red-flag pattern.
	* ~~'''~~Service dials~~'''~~: Wind Vintage explicitly warns about service dials on 6536/1; matte-finish dials with crisp gilt printing read as service replacements vs original gloss. The Robert Maron "underline dial" reference is one provenance check.		* Service dials: Wind Vintage explicitly warns about service dials on 6536/1; matte-finish dials with crisp gilt printing read as service replacements vs original gloss. The Robert Maron "underline dial" reference is one provenance check.
	* ~~'''~~Crown~~'''~~: original is single-coronet "Brevet" 6mm with double-lock (no later three-dot crown); a three-dot crown is a service replacement.		* Crown: original is single-coronet "Brevet" 6mm with double-lock (no later three-dot crown); a three-dot crown is a service replacement.
	* ~~'''~~Case polish / lug bevels~~'''~~: unpolished examples command 5–10× over polished pieces. Sharp bevels and crisp lug edges are non-negotiable for top-tier examples.		* Case polish / lug bevels: unpolished examples command 5–10× over polished pieces. Sharp bevels and crisp lug edges are non-negotiable for top-tier examples.

	<span id="historical-market-and-auction-record"></span>		<span id="historical-market-and-auction-record"></span>

← Older revision		Revision as of 21:44, 29 April 2026
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	<small>[[Reference:submariner\|Submariner]] -> '''6536'''</small>		<small>[[Reference:submariner\|Submariner]] -> '''6536'''</small>

	The 6536 and 6536/1 are the last small-crown 100m no-crown-guard Submariners. The pair shares the same case generation, the same production era (1955 to 1959 across ~~the auction~~-house ~~corpus~~), and the same caliber 1030 — Rolex's first bidirectional automatic. The /1 is a caseback-engraving update on an otherwise identical reference; the caseback engraving is the only standard way to tell the two apart. A 2024 reading of the Foulkes Submariner book ''Oyster Perpetual Submariner: The Watch That Unlocked the Deep'' (citing data from Rolex's archive) gives the parent 6536 a total of 5,350 pieces — the 100-unit figure that surfaces in dealer copy is wrong for the parent reference and likely refers to the OCC four-line subvariant only. The pair closes the unguarded small-crown Submariner before the 5512 introduced crown guards in late 1959.		The 6536 and 6536/1 are the last small-crown 100m no-crown-guard Submariners. The pair shares the same case generation, the same production era (1955 to 1959 across major-house lots), and the same caliber 1030 — Rolex's first bidirectional automatic. The /1 is a caseback-engraving update on an otherwise identical reference; the caseback engraving is the only standard way to tell the two apart. A 2024 reading of the Foulkes Submariner book ''Oyster Perpetual Submariner: The Watch That Unlocked the Deep'' (citing data from Rolex's archive) gives the parent 6536 a total of 5,350 pieces — the 100-unit figure that surfaces in dealer copy is wrong for the parent reference and likely refers to the OCC four-line subvariant only. The pair closes the unguarded small-crown Submariner before the 5512 introduced crown guards in late 1959.

	<span id="core-facts"></span>		<span id="core-facts"></span>
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	[[File:Ref 6536 movement.jpg\|thumb\|right\|250px\|alt=Caliber 1030 movement\|Caliber 1030 movement]]		[[File:Ref 6536 movement.jpg\|thumb\|right\|250px\|alt=Caliber 1030 movement\|Caliber 1030 movement]]

	The 6536 family runs caliber 1030 — Rolex's first bidirectional automatic, introduced in 1950. The 1030 carries a butterfly rotor stamped ROLEX PERPETUAL PATENTED, two prongs hollowed on a semi-circle, and replaces the bumper-and-Hunter rotor architecture of the bubble-back era. Specs converge across the specialist registries and ~~auction~~-house ~~corpus~~ at 28.5mm × 5.85mm, 25 jewels, 18,800 vph, monometallic balance, blue Breguet overcoil. The same caliber appears on late 6205 production and across the 6538.		The 6536 family runs caliber 1030 — Rolex's first bidirectional automatic, introduced in 1950. The 1030 carries a butterfly rotor stamped ROLEX PERPETUAL PATENTED, two prongs hollowed on a semi-circle, and replaces the bumper-and-Hunter rotor architecture of the bubble-back era. Specs converge across the specialist registries and Major-house lots at 28.5mm × 5.85mm, 25 jewels, 18,800 vph, monometallic balance, blue Breguet overcoil. The same caliber appears on late 6205 production and across the 6538.

	Chronometer-certified (OCC) and non-certified versions both exist within the 6536 family on the same base caliber. The split is a certification distinction, not a mechanical one — some movements were sent for chronometer rating and some were not. The chrono-shop dating reads chronometer-rated 6538 examples to "the end of 1958"; the 6536/1 OCC chronometer arrived earlier — RolexHaven dates one OCC 6536/1 to 1957 (case 22x,xxx). Five-position adjustment is the chrono-shop framing of the COSC-equivalent grade for the period.		Chronometer-certified (OCC) and non-certified versions both exist within the 6536 family on the same base caliber. The split is a certification distinction, not a mechanical one — some movements were sent for chronometer rating and some were not. The chrono-shop dating reads chronometer-rated 6538 examples to "the end of 1958"; the 6536/1 OCC chronometer arrived earlier — RolexHaven dates one OCC 6536/1 to 1957 (case 22x,xxx). Five-position adjustment is the chrono-shop framing of the COSC-equivalent grade for the period.
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	=== Two-line, four-line OCC, four-line SCOC, and three-line dials ===		=== Two-line, four-line OCC, four-line SCOC, and three-line dials ===

	* '''Two-line''' (standard): "SUBMARINER" + depth rating. The dominant configuration across ~~the surveyed corpus~~ — Sotheby's, Bonhams, and Phillips lots are predominantly two-line.		* '''Two-line''' (standard): "SUBMARINER" + depth rating. The dominant configuration across documented examples — Sotheby's, Bonhams, and Phillips lots are predominantly two-line.
	* '''Four-line OCC''' ("Officially Certified Chronometer"): adds two extra lines below the depth rating. RolexHaven's "6536-1 OCC 1957" page documents one with case 22x,xxx. Rolex Passion Report references this as "extremely rare." This is the configuration the 100-unit production figure most likely referred to.		* '''Four-line OCC''' ("Officially Certified Chronometer"): adds two extra lines below the depth rating. RolexHaven's "6536-1 OCC 1957" page documents one with case 22x,xxx. Rolex Passion Report references this as "extremely rare." This is the configuration the 100-unit production figure most likely referred to.
	* '''Four-line SCOC''' ("Superlative Chronometer Officially Certified"): later wording on chronometer-rated examples — the same wording change parallels the 5508 / 5512 transition. The OCC-vs-SCOC distinction within the four-line variant is what readers conflate; both are four-line, the wording differs.		* '''Four-line SCOC''' ("Superlative Chronometer Officially Certified"): later wording on chronometer-rated examples — the same wording change parallels the 5508 / 5512 transition. The OCC-vs-SCOC distinction within the four-line variant is what readers conflate; both are four-line, the wording differs.
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	=== Invert dial variant ===		=== Invert dial variant ===

	Rolex Forum collectors have documented an "invert" dial variant on the 6536/1 where the dial text is inverted from the standard layout. Documented examples are extremely scarce and the configuration is treated as a rare sub-variant pending corroboration in ~~the auction~~-house ~~corpus~~.		Rolex Forum collectors have documented an "invert" dial variant on the 6536/1 where the dial text is inverted from the standard layout. Documented examples are extremely scarce and the configuration is treated as a rare sub-variant pending corroboration in major-house lots.

	<span id="6536-8-transitional"></span>		<span id="6536-8-transitional"></span>
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	* '''6636 Oyster (riveted, expandable)''' — most common period-correct delivery for 1956–58 6536 / 6536/1 examples. US-made by Gay Frères stamped end-links 80 (Sotheby's Lot 121 example).		* '''6636 Oyster (riveted, expandable)''' — most common period-correct delivery for 1956–58 6536 / 6536/1 examples. US-made by Gay Frères stamped end-links 80 (Sotheby's Lot 121 example).
	* '''7206 Oyster (fixed-link rivet)''' — Phillips Lot 102 (case 155,502, Q2 1956) is fitted on a 7206-stamped bracelet with end-links 80, direct documentary evidence the 7206 shipped on early 6536/1.		* '''7206 Oyster (fixed-link rivet)''' — Phillips Lot 102 (case 155,502, Q2 1956) is fitted on a 7206-stamped bracelet with end-links 80, direct documentary evidence the 7206 shipped on early 6536/1.
	* '''Jubilee 62510''' — Sotheby's 2021 Lot 35 (case 112,256) is on a Jubilee stamped 1960. Period-fitted Jubilee on a 6536/1 is unusual and not the standard original-delivery configuration, but it appears in the ~~corpus~~.		* '''Jubilee 62510''' — Sotheby's 2021 Lot 35 (case 112,256) is on a Jubilee stamped 1960. Period-fitted Jubilee on a 6536/1 is unusual and not the standard original-delivery configuration, but it appears in the auction record.

	The 6251H is documented elsewhere on small-crown Subs but is not directly attested for 6536 / 6536-1 in this corpus. End-link "65" is the small-crown standard across Wind Vintage, RolexHaven, and Le Monde Edmond examples; end-link "80" appears on later 1959 examples and post-Submariner-line bracelets.		The 6251H is documented elsewhere on small-crown Subs but is not directly attested for 6536 / 6536-1 in this corpus. End-link "65" is the small-crown standard across Wind Vintage, RolexHaven, and Le Monde Edmond examples; end-link "80" appears on later 1959 examples and post-Submariner-line bracelets.

← Older revision		Revision as of 13:38, 29 April 2026
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	{{#seo:		{{#seo:
	\|title=Rolex 6536 Submariner — Production, Dial Variants, Serial Ranges \| BezelBase		\|title=Rolex 6536 Submariner — Production, Dial Variants, Serial Ranges \| BezelBase
	\|description=The 6536 and 6536/1 are the last small-crown 100m no-crown-guard Submariners. 1955 to 1959, ~5,350 produced ~~(Goldammer / Foulkes 2024)~~. Caliber 1030 bidirectional automatic. Sotheby's 2018 USD 225,000 record for III.57 case 306,989.		\|description=The 6536 and 6536/1 are the last small-crown 100m no-crown-guard Submariners. 1955 to 1959, ~5,350 produced. Caliber 1030 bidirectional automatic. Sotheby's 2018 USD 225,000 record for III.57 case 306,989.
	\|keywords=Rolex, 6536, 6536/1, Submariner, small crown, caliber 1030, butterfly rotor, no crown guards		\|keywords=Rolex, 6536, 6536/1, Submariner, small crown, caliber 1030, butterfly rotor, no crown guards
	\|image=Ref 6536 hero.webp		\|image=Ref 6536 hero.webp
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	<small>[[Reference:submariner\|Submariner]] -> '''6536'''</small>		<small>[[Reference:submariner\|Submariner]] -> '''6536'''</small>

	The 6536 and 6536/1 are the last small-crown 100m no-crown-guard Submariners. The pair shares the same case generation, the same production era (1955 to 1959 across the auction-house corpus), and the same caliber 1030 — Rolex's first bidirectional automatic. The /1 is a caseback-engraving update on an otherwise identical reference; the caseback engraving is the only definitive way to tell the two apart. ~~Goldammer's September~~ 2024 reading of the Foulkes book ''Oyster Perpetual Submariner: The Watch That Unlocked the Deep'' (citing data from Rolex's archive) gives the parent 6536 a total of 5,350 pieces — the 100-unit figure that surfaces in dealer copy is wrong for the parent reference and likely refers to the OCC four-line subvariant only. The pair closes the unguarded small-crown Submariner before the 5512 introduced crown guards in late 1959.		The 6536 and 6536/1 are the last small-crown 100m no-crown-guard Submariners. The pair shares the same case generation, the same production era (1955 to 1959 across the auction-house corpus), and the same caliber 1030 — Rolex's first bidirectional automatic. The /1 is a caseback-engraving update on an otherwise identical reference; the caseback engraving is the only definitive way to tell the two apart. A 2024 reading of the Foulkes Submariner book ''Oyster Perpetual Submariner: The Watch That Unlocked the Deep'' (citing data from Rolex's archive) gives the parent 6536 a total of 5,350 pieces — the 100-unit figure that surfaces in dealer copy is wrong for the parent reference and likely refers to the OCC four-line subvariant only. The pair closes the unguarded small-crown Submariner before the 5512 introduced crown guards in late 1959.

	<span id="core-facts"></span>		<span id="core-facts"></span>
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	\|-		\|-
	\| total produced (parent 6536)		\| total produced (parent 6536)
	\| 5,350 pieces 1955–1959 ~~(Goldammer Sept 2024, citing Foulkes 2024 / Rolex archive)~~. The five no-crown-guard Submariner references (6200, 6204, 6205, 6536, 6538) total 12,144 pieces — the 6536 is roughly 44% of all pre-crown-guard Submariners		\| 5,350 pieces 1955–1959. The five no-crown-guard Submariner references (6200, 6204, 6205, 6536, 6538) total 12,144 pieces — the 6536 is roughly 44% of all pre-crown-guard Submariners
	\|-		\|-
	\| case		\| case
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	== Production outline ==		== Production outline ==

	Production ran 1955 to 1959. The hardest evidence for late-1955 production is on the 6536/1 sub-variant: Sotheby's 2021 Lot 35 carries case 112,256 with a "4 55" caseback (Q4 1955), and Bonhams's December 2021 Lot 36 (Red Depth, case 112,341) carries a "IV.55" caseback. For the parent 6536, Bonhams Lot 116 (case 306,706, March 1957) and Sotheby's Lot 121 (case 399,228, circa 1959) show 6536-stamped casebacks running well into the 6536/1 era. The end-1958 reading sometimes cited in dealer copy is contradicted by the Sotheby's tropical 6536 cataloged "circa 1959" — 1959 is multiply attested across Sotheby's, ~~Le Monde Edmond's~~ three-watch study (case 399,xxx), and the Sotheby's tropical lot. The cleaner phrasing is "1955 or 1956 to 1959" with the launch-year split captured.		Production ran 1955 to 1959. The hardest evidence for late-1955 production is on the 6536/1 sub-variant: Sotheby's 2021 Lot 35 carries case 112,256 with a "4 55" caseback (Q4 1955), and Bonhams's December 2021 Lot 36 (Red Depth, case 112,341) carries a "IV.55" caseback. For the parent 6536, Bonhams Lot 116 (case 306,706, March 1957) and Sotheby's Lot 121 (case 399,228, circa 1959) show 6536-stamped casebacks running well into the 6536/1 era. The end-1958 reading sometimes cited in dealer copy is contradicted by the Sotheby's tropical 6536 cataloged "circa 1959" — 1959 is multiply attested across Sotheby's, A specialist three-watch study (case 399,xxx), and the Sotheby's tropical lot. The cleaner phrasing is "1955 or 1956 to 1959" with the launch-year split captured.

	The total production figure carries the largest correction this audit produces. ~~Goldammer (September~~ 2024), reading ~~data released for the Nicholas~~ Foulkes ~~book~~ '~~'Oyster Perpetual~~ Submariner ~~— The Watch That Unlocked the Deep''~~ (~~2024~~), gives the parent 6536 a total of 5,350 pieces 1955–1959. The five no-crown-guard references combined total 12,144 pieces — the 6536 alone accounts for roughly 44% of all pre-crown-guard Submariner production. The widely-quoted "approximately 100 units" figure that has circulated in dealer literature is wrong for the parent reference; it almost certainly described the OCC chronometer four-line subvariant only and was extended by repetition to cover the whole reference. No separate split is published for 6536/1 vs 6536, and no COSC-vs-non-COSC breakdown.		The total production figure carries the largest correction this audit produces. A 2024 reading of Foulkes's Submariner book (Wallpaper / ACC Art Books) — citing Rolex archive data — gives the parent 6536 a total of 5,350 pieces 1955–1959. The five no-crown-guard references combined total 12,144 pieces — the 6536 alone accounts for roughly 44% of all pre-crown-guard Submariner production. The widely-quoted "approximately 100 units" figure that has circulated in dealer literature is wrong for the parent reference; it almost certainly described the OCC chronometer four-line subvariant only and was extended by repetition to cover the whole reference. No separate split is published for 6536/1 vs 6536, and no COSC-vs-non-COSC breakdown.

	<span id="movement-notes"></span>		<span id="movement-notes"></span>
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	[[File:Ref 6536 movement.jpg\|thumb\|right\|250px\|alt=Caliber 1030 movement\|Caliber 1030 movement]]		[[File:Ref 6536 movement.jpg\|thumb\|right\|250px\|alt=Caliber 1030 movement\|Caliber 1030 movement]]

	The 6536 family runs caliber 1030 — Rolex's first bidirectional automatic, introduced in 1950. The 1030 carries a butterfly rotor stamped ROLEX PERPETUAL PATENTED, two prongs hollowed on a semi-circle, and replaces the bumper-and-Hunter rotor architecture of the bubble-back era. Specs converge across the ~~chrono-shop technical page~~ and auction-house corpus at 28.5mm × 5.85mm, 25 jewels, 18,800 vph, monometallic balance, blue Breguet overcoil. The same caliber appears on late 6205 production and across the 6538.		The 6536 family runs caliber 1030 — Rolex's first bidirectional automatic, introduced in 1950. The 1030 carries a butterfly rotor stamped ROLEX PERPETUAL PATENTED, two prongs hollowed on a semi-circle, and replaces the bumper-and-Hunter rotor architecture of the bubble-back era. Specs converge across the specialist registries and auction-house corpus at 28.5mm × 5.85mm, 25 jewels, 18,800 vph, monometallic balance, blue Breguet overcoil. The same caliber appears on late 6205 production and across the 6538.

	Chronometer-certified (OCC) and non-certified versions both exist within the 6536 family on the same base caliber. The split is a certification distinction, not a mechanical one — some movements were sent for chronometer rating and some were not. The chrono-shop dating reads chronometer-rated 6538 examples to "the end of 1958"; the 6536/1 OCC chronometer arrived earlier — RolexHaven dates one OCC 6536/1 to 1957 (case 22x,xxx). Five-position adjustment is the chrono-shop framing of the COSC-equivalent grade for the period.		Chronometer-certified (OCC) and non-certified versions both exist within the 6536 family on the same base caliber. The split is a certification distinction, not a mechanical one — some movements were sent for chronometer rating and some were not. The chrono-shop dating reads chronometer-rated 6538 examples to "the end of 1958"; the 6536/1 OCC chronometer arrived earlier — RolexHaven dates one OCC 6536/1 to 1957 (case 22x,xxx). Five-position adjustment is the chrono-shop framing of the COSC-equivalent grade for the period.

	Sotheby's 2018 Lot 252 carries the strongest documentation for caliber 1030 on the 6536/1: caseback stamped 6536/1 with III.57, case 306,989, world-record hammer USD 225,000. ~~Le Monde Edmond's~~ three-watch study (cases 22x,xxx, 306,xxx, and 399,xxx, dated 1957–1959) confirms caliber 1030 across the full production run.		Sotheby's 2018 Lot 252 carries the strongest documentation for caliber 1030 on the 6536/1: caseback stamped 6536/1 with III.57, case 306,989, world-record hammer USD 225,000. A specialist three-watch study (cases 22x,xxx, 306,xxx, and 399,xxx, dated 1957–1959) confirms caliber 1030 across the full production run.

	<span id="dial-map"></span>		<span id="dial-map"></span>
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	=== Bezel variants ===		=== Bezel variants ===

	~~Le Monde Edmond's~~ three-watch study captures the bezel evolution within 1957 alone. The earliest 1957 examples carry a silver triangle at zero with no hash marks across the first fifteen minutes — the cleanest and earliest layout. Mid-production examples from 1957 to 1958 keep the no-hash layout but switch to a red triangle at zero, a shift confirmed on a dated 1958 example. Late 1959 production carries the red triangle alongside individual minute hash marks across the first fifteen minutes — the closest ancestor to the bezel that defines the 5512.		A specialist three-watch study captures the bezel evolution within 1957 alone. The earliest 1957 examples carry a silver triangle at zero with no hash marks across the first fifteen minutes — the cleanest and earliest layout. Mid-production examples from 1957 to 1958 keep the no-hash layout but switch to a red triangle at zero, a shift confirmed on a dated 1958 example. Late 1959 production carries the red triangle alongside individual minute hash marks across the first fifteen minutes — the closest ancestor to the bezel that defines the 5512.

	<span id="invert-dial-variant"></span>		<span id="invert-dial-variant"></span>
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	[[File:Ref 6536 case-profiles.webp\|thumb\|right\|220px\|alt=Case profile comparison across Small Crown era\|Case profile comparison across Small Crown era]]		[[File:Ref 6536 case-profiles.webp\|thumb\|right\|220px\|alt=Case profile comparison across Small Crown era\|Case profile comparison across Small Crown era]]

	The case runs about 37mm (37.5mm on the 6536/8 transitional) with a 6mm Brevet crown. The 6mm crown is the visual tell against the 6538's oversized 8mm Brevet. The case belongs to the same generation as the 6538, built around the same tooling philosophy, but sized for the smaller crown tube and lacking the crown guards that arrive with the 5512 in late 1959. The crystal is domed acrylic throughout. The bezel is bidirectional, 60-minute, black anodised aluminium, with a looser action than the precise-click unidirectional bezels that come in later generations. The crown is the original single-coronet "Brevet" 6mm with double-lock; a three-dot crown on a 6536 is a service replacement ~~(Wrist Icons)~~.		The case runs about 37mm (37.5mm on the 6536/8 transitional) with a 6mm Brevet crown. The 6mm crown is the visual tell against the 6538's oversized 8mm Brevet. The case belongs to the same generation as the 6538, built around the same tooling philosophy, but sized for the smaller crown tube and lacking the crown guards that arrive with the 5512 in late 1959. The crystal is domed acrylic throughout. The bezel is bidirectional, 60-minute, black anodised aluminium, with a looser action than the precise-click unidirectional bezels that come in later generations. The crown is the original single-coronet "Brevet" 6mm with double-lock; a three-dot crown on a 6536 is a service replacement.

	Quarterly inside-caseback stamps (Roman numeral quarter . two-digit year) date the case head: IV.55 on Bonhams Red Depth case 112,341; "4 55" on Sotheby's 2021 case 112,256; I.57 on Sotheby's 2018 Lot 215 case 229,640; II.56 on Phillips Geneva V Lot 102 case 155,502; II.57 / III.57 on multiple 1957 lots ~~(Wrist Icons gilt tropical case 3061xx with III.57; Sotheby's 2018 Lot 252 case 306,989 with III.57)~~. The format is consistent and reliable — it dates the case head, not the bracelet. Additional service or job numbers are sometimes added by Rolex New York in the upper-left of the inside back (per RolexHaven OCC page).		Quarterly inside-caseback stamps (Roman numeral quarter. two-digit year) date the case head: IV.55 on Bonhams Red Depth case 112,341; "4 55" on Sotheby's 2021 case 112,256; I.57 on Sotheby's 2018 Lot 215 case 229,640; II.56 on Phillips Geneva V Lot 102 case 155,502; II.57 / III.57 on multiple 1957 lots. The format is consistent and reliable — it dates the case head, not the bracelet. Additional service or job numbers are sometimes added by Rolex New York in the upper-left of the inside back (per RolexHaven OCC page).

	<span id="bracelets-end-links-clasps-and-packaging"></span>		<span id="bracelets-end-links-clasps-and-packaging"></span>
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	== 6536/1 vs 5508 — how they compare ==		== 6536/1 vs 5508 — how they compare ==

	~~Le Monde Edmond's~~ head-to-head comparison gives the cleanest tells. Both are small-crown, no-crown-guard Submariners rated to 100m, the last two Submariners to share that specification. Case height matches at 12.8mm and end-to-end length matches at 38mm; the 5508 caseback is slightly smaller in diameter.		The head-to-head comparison gives the cleanest tells. Both are small-crown, no-crown-guard Submariners rated to 100m, the last two Submariners to share that specification. Case height matches at 12.8mm and end-to-end length matches at 38mm; the 5508 caseback is slightly smaller in diameter.

	The movement is the main mechanical distinction. The 6536/1 runs caliber 1030; the 5508 runs the newer caliber 1530, treated by collectors as more modern and more reliable. Both use full-rotor architectures (1030 butterfly, 1530 standard). Both dials are gilt with Mercedes hands; the 6536/1 reads more golden in tone and the 5508 more silver.		The movement is the main mechanical distinction. The 6536/1 runs caliber 1030; the 5508 runs the newer caliber 1530, treated by collectors as more modern and more reliable. Both use full-rotor architectures (1030 butterfly, 1530 standard). Both dials are gilt with Mercedes hands; the 6536/1 reads more golden in tone and the 5508 more silver.
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	* '''Bezel insert swaps''': the bezel insert evolved rapidly within 1957 alone (silver → red triangle, no-hash → hashed). A 1957 case with a 1959-style hashed insert is a swap, not factory delivery. Christie's 2023 lot 230,421 was sold with a "later and incorrect" bezel insert plus "incorrect" stamped-75 end-links and an aftermarket clasp — illustrative red-flag pattern.		* '''Bezel insert swaps''': the bezel insert evolved rapidly within 1957 alone (silver → red triangle, no-hash → hashed). A 1957 case with a 1959-style hashed insert is a swap, not factory delivery. Christie's 2023 lot 230,421 was sold with a "later and incorrect" bezel insert plus "incorrect" stamped-75 end-links and an aftermarket clasp — illustrative red-flag pattern.
	* '''Service dials''': Wind Vintage explicitly warns about service dials on 6536/1; matte-finish dials with crisp gilt printing read as service replacements vs original gloss. The Robert Maron "underline dial" reference is one provenance check.		* '''Service dials''': Wind Vintage explicitly warns about service dials on 6536/1; matte-finish dials with crisp gilt printing read as service replacements vs original gloss. The Robert Maron "underline dial" reference is one provenance check.
	* '''Crown''': original is single-coronet "Brevet" 6mm with double-lock (no later three-dot crown); a three-dot crown is a service replacement ~~(Wrist Icons)~~.		* '''Crown''': original is single-coronet "Brevet" 6mm with double-lock (no later three-dot crown); a three-dot crown is a service replacement.
	* '''Case polish / lug bevels''': unpolished examples ~~(Wind Vintage SBUXYT3749, Sotheby's 2018 Lot 252)~~ command 5–10× over polished pieces. Sharp bevels and crisp lug edges are non-negotiable for top-tier examples.		* '''Case polish / lug bevels''': unpolished examples command 5–10× over polished pieces. Sharp bevels and crisp lug edges are non-negotiable for top-tier examples.

	<span id="historical-market-and-auction-record"></span>		<span id="historical-market-and-auction-record"></span>