Reference:16520 - Revision history

Admin: Resize hero: 340px -> 250px

2026-04-30T04:21:11Z

Resize hero: 340px -> 250px

← Older revision		Revision as of 04:21, 30 April 2026
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	<span id="core-facts"></span>		<span id="core-facts"></span>
	[[File:Ref 16520 hero.webp\|thumb\|right\|~~340px~~\|alt=Rolex Cosmograph Daytona Ref. 16520 — MK1 floating Cosmograph porcelain dial\|Rolex Cosmograph Daytona Ref. 16520 — MK1 floating Cosmograph porcelain dial]]		[[File:Ref 16520 hero.webp\|thumb\|right\|250px\|alt=Rolex Cosmograph Daytona Ref. 16520 — MK1 floating Cosmograph porcelain dial\|Rolex Cosmograph Daytona Ref. 16520 — MK1 floating Cosmograph porcelain dial]]

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

Admin: Audit: clean stranded dealer-name residue (& Sons, Bulang & Sons, Gray & Sons)

2026-04-29T22:49:58Z

Audit: clean stranded dealer-name residue (& Sons, Bulang & Sons, Gray & Sons)

← Older revision		Revision as of 22:49, 29 April 2026
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	MK1 is the Floating Cosmograph porcelain dial, R-serial production from 1988. It remains the reference point for first-year 16520 collecting; the watch as a whole gets complicated, the first-year hierarchy does not.		MK1 is the Floating Cosmograph porcelain dial, R-serial production from 1988. It remains the reference point for first-year 16520 collecting; the watch as a whole gets complicated, the first-year hierarchy does not.

	The MK2 Floating 4-Liner ran on L-serial production through 1989 and into 1990. The OFFICIALLY CERTIFIED line is missing, leaving four lines of dial text where later dials carry five — the source of the collector name. Singer made the dial; the inverted 6 carries over. Surviving examples pair the 4-Liner dial with the early bezel that reads "UNITS PER HOUR" at 9 o'clock and graduates 50–200, a carry-over from the manual-wind 6265 era. Davide Garbati's photography of the Cattin Collection (~~& Sons,~~ 2020) captures the rare bezel-dial combination.		The MK2 Floating 4-Liner ran on L-serial production through 1989 and into 1990. The OFFICIALLY CERTIFIED line is missing, leaving four lines of dial text where later dials carry five — the source of the collector name. Singer made the dial; the inverted 6 carries over. Surviving examples pair the 4-Liner dial with the early bezel that reads "UNITS PER HOUR" at 9 o'clock and graduates 50–200, a carry-over from the manual-wind 6265 era. Davide Garbati's photography of the Cattin Collection (2020) captures the rare bezel-dial combination.

	The MK3 generation restores OFFICIALLY CERTIFIED on an Inverted 6 dial, running on E through C serials from 1990 through 1992. The dial moves to Rolex production, the OFFICIALLY CERTIFIED line returns, and all five lines space evenly. The inverted "6" in the hour totaliser carries through with four hash marks per five-minute subsection. The bezel transitions inside the MK3 window from the early 50–200 scale with "UNITS PER HOUR" at 3 o'clock to the 60–400 scale with the legend at 1 o'clock; Povey documents three distinct bezel marks across that range.		The MK3 generation restores OFFICIALLY CERTIFIED on an Inverted 6 dial, running on E through C serials from 1990 through 1992. The dial moves to Rolex production, the OFFICIALLY CERTIFIED line returns, and all five lines space evenly. The inverted "6" in the hour totaliser carries through with four hash marks per five-minute subsection. The bezel transitions inside the MK3 window from the early 50–200 scale with "UNITS PER HOUR" at 3 o'clock to the 60–400 scale with the legend at 1 o'clock; Povey documents three distinct bezel marks across that range.

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

2026-04-29T22:47:37Z

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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	MK1 is the Floating Cosmograph porcelain dial, R-serial production from 1988. It remains the reference point for first-year 16520 collecting; the watch as a whole gets complicated, the first-year hierarchy does not.		MK1 is the Floating Cosmograph porcelain dial, R-serial production from 1988. It remains the reference point for first-year 16520 collecting; the watch as a whole gets complicated, the first-year hierarchy does not.

	The MK2 Floating 4-Liner ran on L-serial production through 1989 and into 1990. The OFFICIALLY CERTIFIED line is missing, leaving four lines of dial text where later dials carry five — the source of the collector name. Singer made the dial; the inverted 6 carries over. Surviving examples pair the 4-Liner dial with the early bezel that reads "UNITS PER HOUR" at 9 o'clock and graduates 50–200, a carry-over from the manual-wind 6265 era. Davide Garbati's photography of the Cattin Collection (~~Bulang~~ & Sons, 2020) captures the rare bezel-dial combination.		The MK2 Floating 4-Liner ran on L-serial production through 1989 and into 1990. The OFFICIALLY CERTIFIED line is missing, leaving four lines of dial text where later dials carry five — the source of the collector name. Singer made the dial; the inverted 6 carries over. Surviving examples pair the 4-Liner dial with the early bezel that reads "UNITS PER HOUR" at 9 o'clock and graduates 50–200, a carry-over from the manual-wind 6265 era. Davide Garbati's photography of the Cattin Collection (& Sons, 2020) captures the rare bezel-dial combination.

	The MK3 generation restores OFFICIALLY CERTIFIED on an Inverted 6 dial, running on E through C serials from 1990 through 1992. The dial moves to Rolex production, the OFFICIALLY CERTIFIED line returns, and all five lines space evenly. The inverted "6" in the hour totaliser carries through with four hash marks per five-minute subsection. The bezel transitions inside the MK3 window from the early 50–200 scale with "UNITS PER HOUR" at 3 o'clock to the 60–400 scale with the legend at 1 o'clock; Povey documents three distinct bezel marks across that range.		The MK3 generation restores OFFICIALLY CERTIFIED on an Inverted 6 dial, running on E through C serials from 1990 through 1992. The dial moves to Rolex production, the OFFICIALLY CERTIFIED line returns, and all five lines space evenly. The inverted "6" in the hour totaliser carries through with four hash marks per five-minute subsection. The bezel transitions inside the MK3 window from the early 50–200 scale with "UNITS PER HOUR" at 3 o'clock to the 60–400 scale with the legend at 1 o'clock; Povey documents three distinct bezel marks across that range.

Admin: Text audit: voice, clarity, source links

2026-04-29T20:38:23Z

Text audit: voice, clarity, source links

← Older revision		Revision as of 20:38, 29 April 2026
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	}}		}}

	<small>[[Reference:daytona\|Daytona]] → '''16520'''</small>		<small>[[Reference:daytona\|Daytona]] -> '''16520'''</small>

	The 16520 is the first automatic Rolex Daytona, produced from 1988 to 2000 with cal 4030, a heavily reworked Zenith El Primero base. Twelve years of production took the Daytona from a slow-moving manual-wind chronograph into the steel sports watch that defined the modern Rolex waitlist era. Seven separately collected dial generations sit inside that run.		The 16520 is the first automatic Rolex Daytona, produced from 1988 to 2000 with cal 4030, a heavily reworked Zenith El Primero base. Twelve years of production took the Daytona from a slow-moving manual-wind chronograph into the steel sports watch that defined the modern Rolex waitlist era. Seven separately collected dial generations sit inside that run.
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	== Production outline ==		== Production outline ==

	The 16520 ran for twelve years across eleven serial-prefix batches. ~~The~~ dial~~-map table below carries the row-by-row reading~~; the ~~narrative here is the same story told~~ by ~~what changed when~~.		The 16520 ran for twelve years across eleven serial-prefix batches. Each prefix matches a specific dial / bracelet / bezel configuration; the sequence reads cleanly batch by batch.

	R-prefix serials are the first 1988 batch and carry the dial that defines first-year 16520 collecting: the Singer-made Floating Cosmograph porcelain dial. L-prefix arrived in 1989 with the related 4-Liner dial, where the OFFICIALLY CERTIFIED line is missing (four lines of text instead of the later five) and the same inverted "6" appears in the hour totaliser. E, N, X, and C prefixes carried the inverted-6 generation through 1990–1992, and the bezel scale shifted in this window from the carry-over 50–200 graduation (with "UNITS PER HOUR" at 3 o'clock) to 60–400 with the legend at 1 o'clock.		R-prefix serials are the first 1988 batch and carry the dial that defines first-year 16520 collecting: the Singer-made Floating Cosmograph porcelain dial. L-prefix arrived in 1989 with the related 4-Liner dial, where the OFFICIALLY CERTIFIED line is missing (four lines of text instead of the later five) and the same inverted "6" appears in the hour totaliser. E, N, X, and C prefixes carried the inverted-6 generation through 1990–1992, and the bezel scale shifted in this window from the carry-over 50–200 graduation (with "UNITS PER HOUR" at 3 o'clock) to 60–400 with the legend at 1 o'clock.

Admin: Category fix: Draft → Working Draft to match wider convention (5512/5513/1016/1675/1680/6263 etc.)

2026-04-29T19:19:29Z

Category fix: Draft → Working Draft to match wider convention (5512/5513/1016/1675/1680/6263 etc.)

← Older revision		Revision as of 19:19, 29 April 2026
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	[[Category:Daytona Zenith]]		[[Category:Daytona Zenith]]
	[[Category:Daytona]]		[[Category:Daytona]]
	[[Category:Draft]]		[[Category:Working Draft]]

Admin: SEO: og:image + image_alt + og_type + timestamps

2026-04-29T03:19:55Z

SEO: og:image + image_alt + og_type + timestamps

← Older revision		Revision as of 03:19, 29 April 2026
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	{{#seo:		{{#seo:
	\|title=Rolex ~~Cosmograph~~ Daytona ~~16520 (1988-2000)~~ — ~~Zenith automatic~~, ~~MK1-MK7 dials~~, ~~Patrizzi —~~ BezelBase		\|title=Rolex 16520 Daytona — Production, Dial Variants, Serial Ranges \| BezelBase
	\|description=The first automatic Daytona with cal 4030 (Zenith El Primero base), 12-year run from 1988 to 2000. Seven-mark dial progression from MK1 floating Cosmograph porcelain through MK7 Luminova, with Patrizzi sub-branch.		\|description=The first automatic Daytona with cal 4030 (Zenith El Primero base), 12-year run from 1988 to 2000. Seven-mark dial progression from MK1 floating Cosmograph porcelain through MK7 Luminova, with Patrizzi sub-branch.
	\|keywords=Rolex 16520, Zenith Daytona, cal 4030, El Primero, MK1 floating, Patrizzi dial, 4-Liner, Inverted-6, Mazzariol, Povey, Bulang Cattin Collection		\|keywords=Rolex 16520, Zenith Daytona, cal 4030, El Primero, MK1 floating, Patrizzi dial, 4-Liner, Inverted-6, Mazzariol, Povey, Bulang Cattin Collection
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	\|og_type=article		\|og_type=article
	\|published_time=2026-04-19T03:20:06Z		\|published_time=2026-04-19T03:20:06Z
	\|modified_time=2026-04-29T02:33:~~11Z~~		\|modified_time=2026-04-29T02:47:18Z
	\|robots=index,follow,max-image-preview:large		\|robots=index,follow,max-image-preview:large
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Admin: SEO: og:image + image_alt + og_type + timestamps

2026-04-29T02:47:18Z

SEO: og:image + image_alt + og_type + timestamps

← Older revision		Revision as of 02:47, 29 April 2026
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	\|og_type=article		\|og_type=article
	\|published_time=2026-04-19T03:20:06Z		\|published_time=2026-04-19T03:20:06Z
	\|modified_time=2026-04-~~27T04~~:37:~~48Z~~		\|modified_time=2026-04-29T02:33:11Z
	\|robots=index,follow,max-image-preview:large		\|robots=index,follow,max-image-preview:large
	}}		}}

Admin: SEO: og:image + image_alt + og_type + timestamps

2026-04-29T02:33:11Z

SEO: og:image + image_alt + og_type + timestamps

← Older revision		Revision as of 02:33, 29 April 2026
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	\|og_type=article		\|og_type=article
	\|published_time=2026-04-19T03:20:06Z		\|published_time=2026-04-19T03:20:06Z
	\|modified_time=2026-04-~~24T21~~:28:~~22Z~~		\|modified_time=2026-04-27T04:37:48Z
	\|robots=index,follow,max-image-preview:large		\|robots=index,follow,max-image-preview:large
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Admin: Slop sweep: paragraph challenge + AI-tone scrub

2026-04-27T04:37:48Z

Slop sweep: paragraph challenge + AI-tone scrub

Show changes

Admin: Strip Chevalier (Colin A. White is not a pseudonym; remove confusing label)

2026-04-27T04:33:00Z

Strip Chevalier (Colin A. White is not a pseudonym; remove confusing label)

← Older revision		Revision as of 04:33, 27 April 2026
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	* [https://monochrome-watches.com/history-rolex-daytona-chronograph-1963-in-depth-review/ In-Depth: The History of the Rolex Daytona, The Emblematic Racing Chronograph] — Erik Slaven, Monochrome		* [https://monochrome-watches.com/history-rolex-daytona-chronograph-1963-in-depth-review/ In-Depth: The History of the Rolex Daytona, The Emblematic Racing Chronograph] — Erik Slaven, Monochrome
	* [https://www.vintagewatchstraps.com/ Vintage Watch Straps — Rolex bracelet and clasp reference] — David Boettcher, vintagewatchstraps.com		* [https://www.vintagewatchstraps.com/ Vintage Watch Straps — Rolex bracelet and clasp reference] — David Boettcher, vintagewatchstraps.com
	* ''The Vintage Rolex Field Manual'' — Colin A. White ~~(pseudonym: Chevalier)~~, Morning Tundra		* ''The Vintage Rolex Field Manual'' — Colin A. White, Morning Tundra
	* [https://www.watchtime.com/brands/watches/tracking-the-rolex-daytona-a-53-year-history Tracking the Rolex Daytona: A 55-Year History] — WatchTime Team, WatchTime		* [https://www.watchtime.com/brands/watches/tracking-the-rolex-daytona-a-53-year-history Tracking the Rolex Daytona: A 55-Year History] — WatchTime Team, WatchTime
	* [https://www.fratellowatches.com/why-i-bought-the-rolex-cosmograph-daytona-reference-116520/ Why I Bought The Rolex Cosmograph Daytona Reference 116520] — Ben Hodges, Fratello Watches		* [https://www.fratellowatches.com/why-i-bought-the-rolex-cosmograph-daytona-reference-116520/ Why I Bought The Rolex Cosmograph Daytona Reference 116520] — Ben Hodges, Fratello Watches