Reference:4925

Air-King -> 4925

The 4925 is the first Rolex Air-King — the 1945 hand-wound 34mm Oyster that gave the line its name. It launches alongside three sibling names: Air-Lion, Air-Tiger, Air-Giant. By the early 1950s only the Air-King survives. The 4925 carries the Air-King designation forward through the late 1940s and into the early 1950s, then hands off to the automatic 6552 (1953–57) and ultimately to the long-running 5500 (1957–89). Without the 4925 there is no Air-King line at all.

Inside the four-name commemoration sits a story that everyone repeats and nobody can primary-source. Hans Wilsdorf had been in London during the Battle of Britain and watched RAF pilots privately purchase Rolex Oysters because they preferred them to military-issue alternatives; the 1945 Air-King naming was, the canon goes, his commemoration of those pilots. Monochrome (Erik Slaven, January 2025), Goldammer (Marcus Siems), Rescapement (Tony Traina), Rolex Magazine (Jake Ehrlich, 2013), Robb Report, and Revolution all carry the framing in roughly identical form. None cite Wilsdorf's words, a period Rolex marketing piece, or Dowling and Hess's The Best of Time (the obvious candidate book). Craft + Tailored is the only publisher that prefaces the story with "according to legend." The Battle of Britain framing is universally repeated and never primary-sourced.

Core facts

detail	value
reference	4925
family	Air-King
common name	"the original Air-King," "the hand-wound Air-King"
production	1945–1953 consensus (Goldammer, Monochrome, Rescapement, Beckertime); case-number dating on Sotheby's lot 190 (case 354,085) places one example at c.1956 — case-stock assembly continued past the catalogue end
case	34mm stainless steel Oyster, Bubbleback-class three-piece, smooth bezel, screw-down brevet crown (manual — no Twinlock in the period), drilled lugs
crystal	acrylic plexiglass, domed
water resistance	50m
movement	Aegler Cal. 10½ ligne "Hunter" family — 15 jewels (early), 17 jewels (later running update), 18,000 vph, central seconds, manual wind, non-chronometer
dial text	"OYSTER AIR-KING," typically with "PRECISION" line above six (some 4925s without "PRECISION" text); applied gold Arabic numerals on eggshell ground in early production, applied baton indices on later examples
bracelet	19mm Oyster — period-correct rivet bracelet (the 7205 successor to the 6635 era arrives later in the production window)
caseback	screw-down threaded Oyster, smooth exterior; presentation engravings turn up but are not catalogued at major-house auction
sister names	Air-Lion, Air-Tiger, Air-Giant — ran on shared references (4365 sub-seconds, 4444 mid-size with gold bezel, 4647 Hunter Precision) rather than dedicated reference numbers
predecessor	direct period antecedent is the manual-wind Bubbleback line (2940 / 2764 / 3131 / 3135 era); the Air-King naming itself has no predecessor
successor	6552 (1953–57, first automatic Air-King, cal 1030)

Where it sits in the line

The 4925 sits at the front of every Air-King story. The Air-King line has no pre-1945 history; the 4925 is where the dial-text designation begins. It runs alongside the 4365 (1945, sub-seconds variant on the same case architecture, the canonical Air-Lion / Air-Tiger / Air-Giant case), the 4444 (mid-size with solid-gold bezel and crown, ran Air-Lion / Air-Giant / Air-King dial-signed examples), the 4647 (Hunter Precision case that surfaces with Air-Lion signing), and the 4499 (1946 onward, an upgraded 17-jewel running mate that some sources read as the 4925's successor and others as a parallel sibling). Reading 4499 as a strict successor is the Time-Wire line; Goldammer, Beckertime, and Rolex Magazine read the four-reference launch as parallel.

The case architecture handed off to the 6552 in 1953 — same 34mm Oyster envelope, but with the new automatic Cal. 1030 underneath and an applied coronet at twelve replacing the early printed-coronet dial layout. The 5500 (1957–89) succeeds the 6552 and runs the Cal. 1530 / 1520 generation across the Air-King line for 32 more years. Time-Wire's reading that 5500 is the direct successor to 4925 skips the 6552 entirely and is incorrect; the canonical sequence is 4925 → 6552 → 5500.

The Air-King survives where Air-Lion, Air-Tiger, and Air-Giant do not. The other three names disappear from Rolex's catalogue by the early 1950s. Air-Tiger reappears on the Tudor side as ref 7957 (Foundwell c.1959, Analog:Shift c.1964), continuing the cross-brand Battle of Britain commemoration into the Tudor catalogue after Rolex retires it. Air-Lion and Air-Giant don't make the Tudor jump.

Production outline

The launch year is firm. 1945 across Goldammer, Monochrome (Erik Slaven, January 2025), Rescapement (Tony Traina), Beckertime, Rolex Magazine (Jake Ehrlich, 2013), Robb Report, and Watch-Wiki. The 1945 launch ties the Air-King naming directly to the end of the war and the Battle of Britain commemoration the canon attaches to it.

The end year is contested. 1953 is the consensus retirement date — Goldammer, Monochrome, Rescapement, Beckertime, Robb Report. Antiquorum lot 382 (25 September 2002) reads instead "the Air-King was first introduced in 1953 in honor of the Royal Air Force pilots who flew in the battle of Britain," treating the automatic 6552 as the "real" launch — a major-house catalogue text that contradicts the 1945-launch consensus. Time-Wire narrows the 4925 specifically to "approximately 1945–1946" and reads the 4499 as its 1946 replacement. Sotheby's lot 190 (4 September 2020) catalogues a 4925 by case number 354,085 to c.1956, and a Beckertime / eBay artifact carries a 1958 dial — both push the upper bound past the 1953 consensus.

The cleanest reading: 4925 enters the catalogue in 1945, is formally retired in 1953 when the automatic 6552 takes over, and continues to be cased and dispatched out of leftover stock into the late 1950s. 1945–1953 is the active production window; case-number examples post-1953 are late stock.

Total production output is not published by Rolex for any 4925. The reference is scarce at major-house auction — Sotheby's lot 190 (2020) is the only standalone Phillips / Sotheby's / Christie's / Bonhams 4925 lot to surface in the auction record. Antiquorum has stronger 4925 coverage but most Antiquorum Air-King lots from the 1990s and 2000s are 5500-era rather than 4925. The two Baer & Bosch lots (AN3907 and lot 3189, both 2019) round out the documented record.

Movement notes

The 4925 runs the Aegler Cal. 10½ ligne Hunter family — the same caliber lineage that powers the contemporary Bubbleback line and the 4365 / 4444 / 4499 sister Air-references. The "Hunter" designation refers to the 700-series base architecture: caliber 700 / 710 / 720 / similar, with running updates across the production window. Manual wind, central seconds, 15 jewels in the early production, 17 jewels as a running update later (Sotheby's lot 190 catalogues "17 jewels, stamped ROW"). 18,000 vph, non-chronometer, no shock protection in the earliest examples.

The caliber is the technical bridge between the pre-war Bubbleback manual-wind movements and the post-1953 automatic 1030 generation. The Hunter caliber's 10½-ligne envelope sets the case profile — flat enough that the 4925 doesn't need the deep "bubbleback" caseback dome required for the Perpetual rotor. The case profile is closer to the post-war flat-case Oyster than to the pre-war Bubbleback proper.

The Field Manual treats the early Hunter calibers as a transitional generation — chronologically post-Bubbleback but pre-modern, and powered by Aegler movements that continue the 1930s shaped-caliber lineage but in round 10½-ligne form. The 4925 inherits this caliber and uses it for the entire production window. The 6552 successor in 1953 is the first Air-King to break the 10½ Hunter line and adopt the modern 1030 architecture.

Dial map

The 4925 dial map is narrower than the 5500 — a function both of the shorter production window and of the lower auction visibility. Documented variants:

Eggshell with applied gold Arabic numerals

The canonical 4925 dial. Eggshell or cream ground, applied gold Arabic hour markers in a shallow avant-garde font, leaf or pencil hands, blued central seconds. Rolex crown printed below twelve, "OYSTER AIR-KING" beneath, simple track of matching applied dots around the perimeter. Monochrome describes this as the originating layout; the Baer & Bosch 2019 lot AN3907 confirms the configuration ("silver Rolex Oyster Air-King dial with applied gold-tone Arabic and arrowhead hour markers"). The dominant configuration on early-to-mid production 4925s.

"PRECISION" text vs no precision text

Time-Wire* documents two dial sub-variants — one with "PRECISION" printed below the AIR-KING line, one without. The PRECISION text is consistent with the period Rolex grading-language convention (Precision, Extra Precision, Super Precision; the Hunter caliber was never chronometer-rated, so PRECISION is the highest grade text the 4925 carries). The non-PRECISION variant either pre-dates the convention or represents an early-production minority.

Early-1945 dials with no SWISS MADE text

Time-Wire* flags a sub-variant of the early production: dials without "SWISS MADE" at the bottom, succeeded by the standard SWISS-MADE-text dials later in the same year. The omission likely reflects pre-mandatory-marking-era production rather than a marketing choice; the SWISS MADE requirement on Swiss watch dials post-dates the early-1945 launch.

Silvered with applied baton indices (late production)

Sotheby's lot 190 (2020) catalogues a 4925 with a silvered dial, applied baton indices rather than Arabic numerals, and alpha hands — the case dated by serial number 354,085 to c.1956. The configuration matches the post-war minimalist applied-baton dials that were becoming the Rolex catalogue standard by the mid-1950s, and reads as a late-production 4925 made out of bridging stock as the 6552 was taking over.

The Roman, sector, salmon, honeycomb, clous-de-Paris, tropical, RAF crest, and retailer-signed (Asprey, Tiffany, Beyer, Cartier, Gübelin) 4925 configurations are not documented in major-house lots. A 1958-dated eBay listing surfaces a "Military Dial" 4925 but the configuration is unverified.

Case and construction

34mm stainless steel three-piece Oyster — case middle, threaded caseback, threaded crown. The case profile reads closer to the post-war flat Oyster than to the pre-war Bubbleback proper; the Cal. 10½ Hunter doesn't need the rotor-clearance dome. Lugs are 19mm with drilled spring-bar holes. The bezel is fixed and steel and smooth. The crown is a manual-wind brevet, screw-down, no Twinlock — Twinlock arrives in the 1950s on the Oyster sport line, not on the 4925.

The case is steel-only across documented examples. The 4444 (Air-Lion / Air-Giant / Air-King) carries a documented two-tone construction with a solid-gold bezel and crown, but the 4925 is consistently catalogued in plain steel. Sotheby's lot 190 (2020) gives 33mm rather than 34mm — within measurement-method tolerance for a watch usually quoted at 34mm. Across all surfaced major-house lots the case dimensions read consistent.

The caseback exterior is smooth without a date stamp. The interior carries reference and case-number markings. Roman-quarter date codes (II.46, III.48, IV.51, etc.) inside the caseback are the cleanest per-watch dating tell. Drilled spring-bar holes are period-correct on the 4925 lugs and persist into the 5500 era; the convention on the 4925 is consistent with the broader pre-1990 vintage Rolex line.

Bracelets, end-links, and clasps

The 4925 era pre-dates the formal numbered Oyster bracelet references that anchor the later Air-King line. Period-correct fitment is a 19mm rivet Oyster with the early 6635-class end-links. The 7205 rivet Oyster (with end-link 57) that becomes standard on the 5500 also turns up on late-production 4925s and on service-era refits — Baer & Bosch lot AN3907 documents a 4925 case fitted with a 7205 dating from 1967 (clasp date code), making it a service-era refit rather than original delivery. Bracelet originality on a 4925 needs case-and-clasp-date verification rather than relying on the bracelet reference number alone, and most surviving 4925s wear bracelets that post-date the 4925's own production by a decade or more.

Special branches

The Battle of Britain commemoration

The framing canonical to every published Air-King history: Hans Wilsdorf was in London during the Battle of Britain and watched RAF pilots privately purchase Rolex Oysters because they preferred them to military issue, and the 1945 Air-King naming commemorated those pilots. Monochrome, Goldammer, Rescapement, Rolex Magazine, Robb Report, Revolution, Foundwell, Analog:Shift, and Craft + Tailored all carry the framing in close-to-identical form.

No primary source surfaces in this article's research pass. None of the published editorial cites Wilsdorf's words, period Rolex marketing material, or Dowling and Hess's The Best of Time (the canonical Rolex history book and the obvious candidate for the primary source). Craft + Tailored is the only publication that prefaces the story with "according to legend." The framing is universally repeated and never primary-sourced.

Air-Lion, Air-Tiger, Air-Giant — the sister names

The Air-King launches alongside three sister names in the 1945 commemoration. None of the three runs on a dedicated reference number; instead the names share refs 4365 (sub-seconds 10½ Hunter), 4444 (mid-size with solid-gold bezel and crown, 31.75mm), and 4647 (Hunter Precision case). Goldammer publishes a side-by-side photograph captioned "Air-Tiger (left), Air-Giant (middle) and Air-Lion (right) — all reference 4365 from the 1940s," confirming the same case-and-movement combination took whichever sister name the market called for.

The 4444 is the most-documented mid-size sister: A documented 4444 Air-Lion (steel with solid-gold bezel and crown, 17-jewel manual) is described in dealer catalogue text as "extremely uncommon, having encountered only one other in over 35 years." The 4647 surfaces less frequently — Foundwell catalogues a 4647 Air-Lion (~1947, 31×39mm Hunter Precision), the only 4647 surfaced in the auction record.

By the early 1950s Rolex retires Air-Lion, Air-Tiger, and Air-Giant. Only Air-King survives. Tudor revives Air-Tiger on its own ref 7957 (Foundwell c.1959, Analog:Shift c.1964), and the cross-brand Air-Tiger continuation explains why the name disappears from Rolex but persists on Tudor catalogues into the 1960s. Air-Lion and Air-Giant make no jump and disappear entirely.

Early-1945 dials without SWISS MADE

A small early-production sub-variant carries dials without the "SWISS MADE" text at the bottom edge. The omission pre-dates Rolex's adoption of the convention rather than reflecting a marketing or market-specific choice; the early-1945 4925s sit on the boundary of when SWISS MADE became standard on Rolex dials. Time-Wire documents the variant; no major-house lot anchor surfaces.

Historical market and auction record

Sale	Lot	Year	Reference details	Result
Sotheby's New York Watches	190	2020	4925 c.1956, case 354,085, silvered dial with applied baton indices, alpha hands, mechanical 17-jewel ROW	Est. USD 5,000–7,000, did not sell
Antiquorum Geneva	382	2002	Generic Air-King Super Precision 1950s (5500-era cal 1530, mis-attributed to the early Air-King launch)	Catalogue text contests the 1945 launch consensus
Baer & Bosch	AN3907	2019	4925 with refreshed silvered dial, applied gold-tone Arabic and arrowhead hour markers; on later Oyster rivet 7205 (1967 clasp date — service-era refit)
Baer & Bosch	3189	2019	4925 with silvered dial, applied gold Arabic and arrowhead indexes

The 4925 is scarce at major-house auction. Phillips, Christie's, and Bonhams have no documented standalone 4925 lots through 2025. Sotheby's lot 190 (2020) is the only Phillips-tier 4925 to surface in the auction record and did not sell at its USD 5,000–7,000 estimate. The visible auction record sits well below 10 strong examples — a function of the 1945 production window's age, the modest profile of the watch in its day (this was an entry-level Rolex, not a flagship), and the 80-year service-and-restoration history that has compromised most surviving examples.

Authentication

The 4925 is 80 years old. Most surviving examples have been serviced multiple times across that span, and dial restoration was particularly common during the 1980s–2000s collector window when the early Air-King was less prized than it became after the Air-King family's rediscovery. The dial-restoration logic Eric Wind documents at Wind Vintage applies: a perfectly clean original dial on an 80-year-old 4925 should be treated as suspect; period patina (silvering loss, applied-marker shadowing, lume aging on the printed coronet) is the originality positive.

The case interior should carry the 4925 reference stamp and a Roman-quarter date code consistent with the 1945–1953 production window. Case numbers in the auction record run roughly 350,000–360,000 (Sotheby's lot 190 case 354,085) for the late-production examples; earlier 4925s carry lower case numbers. A 4925 with a case number outside this band — particularly any case number above 400,000 — should be examined carefully; case-stock assembly into the late 1950s is documented but not unlimited, and a much later case number is more likely a service-replacement case middle than original delivery.

The movement number versus the case number is the standard authentication anchor. Both should be period-consistent and should match the catalogue's recorded ranges where they exist. A 4925 with a Cal 1030 (the 6552 successor's caliber), Cal 1530, or Cal 1520 movement is a service-replacement movement and not original — the 4925 should always carry a Cal 10½ Hunter family movement (700 / 710 / 720 series). The "stamped ROW" marking documented on Sotheby's lot 190 (Rolex Watch Co.) is period-correct.

The bracelet usually doesn't help. Most surviving 4925s wear post-1960s bracelets — Baer & Bosch lot AN3907 is on a 1967-clasp 7205 — and a period-correct rivet Oyster from the 4925's own production window is rare in surviving inventory. Authenticate the head and movement first, then read the bracelet as supplementary evidence rather than as an originality anchor.

Sources