Reference:3666 - Revision history

Admin: Resize hero: 340px -> 250px

2026-04-30T04:22:13Z

Resize hero: 340px -> 250px

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	<span id="core-facts"></span>		<span id="core-facts"></span>
	[[File:Ref 3666 hero.jpg\|thumb\|right\|~~340px~~\|alt=Rolex 3666 Submarine Hermetique first variant\|Rolex 3666 Submarine Hermetique, first variant]]		[[File:Ref 3666 hero.jpg\|thumb\|right\|250px\|alt=Rolex 3666 Submarine Hermetique first variant\|Rolex 3666 Submarine Hermetique, first variant]]
	== Core facts ==		== Core facts ==

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2026-04-29T03:21:57Z

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	{{#seo:		{{#seo:
	\|title=Rolex ~~Submarine Hermetique~~ 3666 — BezelBase		\|title=Rolex 3666 — Production, Dial Variants, Serial Ranges \| BezelBase
	\|description=The 3666 is a pre-Oyster. Before Rolex settled on the three-piece screwed case that defined everything from late 1926 onward, Wilsdorf was already selling…		\|description=The 3666 is a pre-Oyster. Before Rolex settled on the three-piece screwed case that defined everything from late 1926 onward, Wilsdorf was already selling…
	\|keywords=Rolex, 3666, Submarine, specifications, reference guide		\|keywords=Rolex, 3666, Submarine, specifications, reference guide
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	\|og_type=article		\|og_type=article
	\|published_time=2026-04-17T21:45:17Z		\|published_time=2026-04-17T21:45:17Z
	\|modified_time=2026-04-29T02:35:~~12Z~~		\|modified_time=2026-04-29T02:49:20Z
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2026-04-29T02:49:20Z

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	\|published_time=2026-04-17T21:45:17Z		\|published_time=2026-04-17T21:45:17Z
	\|modified_time=2026-04-~~27T04~~:33:~~25Z~~		\|modified_time=2026-04-29T02:35:12Z
	\|robots=index,follow,max-image-preview:large		\|robots=index,follow,max-image-preview:large
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2026-04-29T02:35:12Z

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	\|published_time=2026-04-17T21:45:17Z		\|published_time=2026-04-17T21:45:17Z
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Admin: Strip Chevalier (Colin A. White is not a pseudonym; remove confusing label)

2026-04-27T04:33:25Z

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

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	* [https://www.phillips.com/auctions/watches Phillips — 3666 valjoux chronograph]		* [https://www.phillips.com/auctions/watches Phillips — 3666 valjoux chronograph]
	* [https://www.windvintage.com/blog/2022/9/7/the-oyster-story Wind Vintage — The Oyster Story (Part 1)] — Owen Lawton / Wind Vintage, Wind Vintage		* [https://www.windvintage.com/blog/2022/9/7/the-oyster-story Wind Vintage — The Oyster Story (Part 1)] — Owen Lawton / Wind Vintage, Wind Vintage
	* The Vintage Rolex Field Manual~~, Chevalier Edition~~ — ~~unknown~~, Morning Tundra		* ''The Vintage Rolex Field Manual'' — Colin A. White, Morning Tundra

	[[Category:Submarine]]		[[Category:Submarine]]
	[[Category:Working Draft]]		[[Category:Working Draft]]

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	\|description=The 3666 is a pre-Oyster. Before Rolex settled on the three-piece screwed case that defined everything from late 1926 onward, Wilsdorf was already selling…		\|description=The 3666 is a pre-Oyster. Before Rolex settled on the three-piece screwed case that defined everything from late 1926 onward, Wilsdorf was already selling…
	\|keywords=Rolex, 3666, Submarine, specifications, reference guide		\|keywords=Rolex, 3666, Submarine, specifications, reference guide
			\|image=Ref 3666 hero.jpg
			\|image_alt=Rolex 3666 Submarine Hermetique first variant
	\|type=article		\|type=article
			\|og_type=article
			\|published_time=2026-04-17T21:45:17Z
			\|modified_time=2026-04-25T02:24:24Z
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Admin: Trim another small batch of dense reference prose

2026-04-25T02:24:24Z

Trim another small batch of dense reference prose

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	[[File:Ref3666_cargills_ceylon.jpg\|thumb\|right\|300px\|alt=1924 ref 3666 Submarine Hermetique in silver, retailed by Cargills Ltd. Ceylon.\|1924 ref 3666 Submarine Hermetique in silver, retailed by Cargills Ltd. Ceylon.]]		[[File:Ref3666_cargills_ceylon.jpg\|thumb\|right\|300px\|alt=1924 ref 3666 Submarine Hermetique in silver, retailed by Cargills Ltd. Ceylon.\|1924 ref 3666 Submarine Hermetique in silver, retailed by Cargills Ltd. Ceylon.]]

	The best-documented surviving 3666 is a 1924 sterling silver ~~Hermetic retailed by~~ Cargills ~~Ltd.~~ Ceylon~~, the Colombo department store that distributed Rolex across the British colonial market in the 1920s~~. It ~~surfaced publicly through [https://www.boldtimepieces.co.uk/ Bold Timepieces]. The case~~ is ~~hallmarked silver,~~ the case markings include the Finger patent text ("JF / Double Boitier Brevet 89276"), the inner case is signed W&D, and the dial is white enamel with black Arabic numerals and subsidiary seconds at 6. The watch is presented as a working example of the architecture~~: the outer case unscrews, the inner case lifts out,~~ and the ~~movement winds through the pendant of the inner case~~.		The best-documented surviving 3666 is the 1924 sterling silver Cargills Ceylon watch. It is the practical anchor because it shows the architecture clearly and keeps the patent markings intact.

	The Cargills retail signature places the watch in the early 1920s colonial supply chain that Rolex used for India, Ceylon, Singapore, and Hong Kong, a route that would matter again twenty years later when wartime contracts for the Bombay Presidency passed through the same network. The 1924 dating is the standard Cargills period; company records tie the Rolex distribution agreement to that decade.		The Cargills retail signature places the watch in the early 1920s colonial supply chain that Rolex used for India, Ceylon, Singapore, and Hong Kong, a route that would matter again twenty years later when wartime contracts for the Bombay Presidency passed through the same network. The 1924 dating is the standard Cargills period; company records tie the Rolex distribution agreement to that decade.
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	== What the 3666 established ==		== What the 3666 established ==

	Three things ~~survive~~ from the Hermetic era ~~into the Rolex canon. The first is~~ waterproofing as a design priority~~. Before~~ the ~~3666, no wristwatch manufacturer had committed seriously to sealing against water~~, and the ~~dominant position was~~ that ~~waterproofing was a pocket-watch problem that did not apply to wristwatches. Finger solved it brutally, Wilsdorf saw~~ the solution~~, licensed the case, registered the Submarine trademark, and put the first genuinely waterproof Rolex wristwatches onto the British and colonial markets through 1922 and after~~. ~~Everything that follows (the 1926~~ Oyster~~, the 1927 Gleitze Channel swim on ref 34075, the 1953 Submariner dive watch)~~ is ~~downstream of~~ that ~~commitment~~.		Three things carry forward from the Hermetic era: waterproofing as a design priority, the Submarine name itself, and the lesson that the solution had to become more usable. The Oyster is Rolex's answer to that third point.

	The second is the Submarine name itself. Registered on 31 March 1922 and held in reserve for thirty-one years before the dive watch picked it up again, the trademark survived corporate reorganization, the Oyster transition, and the Second World War. The 1953 Submariner did not arrive out of nowhere. Its name was sitting in the Rolex trademark portfolio from the previous decade.		The second is the Submarine name itself. Registered on 31 March 1922 and held in reserve for thirty-one years before the dive watch picked it up again, the trademark survived corporate reorganization, the Oyster transition, and the Second World War. The 1953 Submariner did not arrive out of nowhere. Its name was sitting in the Rolex trademark portfolio from the previous decade.

Admin: Trim another tier of dense reference prose

2026-04-24T16:36:31Z

Trim another tier of dense reference prose

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	=== Dimensions ===		=== Dimensions ===

	The ~~single most carefully~~ measured ~~Hermetic in~~ the ~~published record is the [https://www~~.~~vintagewatchstraps.com/blogoystercase.php vintagewatchstraps.com] example documented by David Boettcher:~~ outer case 32.35 mm overall, inner movement 21 mm, caliber 9.3 ligne (commonly rounded as "9½ ligne" in period sources). Other surfaced examples include a 33 mm sterling silver Hermetic with a white enamel dial and a 9ct pink gold "Officer's watch" configuration dated 1924. The 32–33 mm outer diameter places the Hermetic at the larger end of early 1920s wristwatches, but the ~~visible~~ dial ~~area~~ is ~~constrained by~~ the ~~need~~ to ~~fit the smaller~~ inner case inside~~. The actual dial of a 3666 is a 21 mm disc set into a 32 mm shell, with~~ the outer ~~case ring visible as a broad bezel around it~~.		The measured dimensions tell the story clearly enough. The outer case is about 32 to 33mm, but the actual dial is much smaller because the watch has to carry a full sealed inner case inside the outer shell.

	<span id="dial-and-hand-variants"></span>		<span id="dial-and-hand-variants"></span>
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	Rolex reused the reference number. In 1940, the firm fitted a Valjoux-22 antimagnetic chronograph movement into a completely different case and stamped it ref 3666. [https://www.phillips.com/auctions/watches Phillips] has sold that watch under catalog number CH080216 for CHF 162,500. It is a waterproof-cased chronograph with a tachymeter scale, pump pushers, and a round steel case in the 35–37 mm range, visually and mechanically unrelated to the 1924 Hermetic. The two watches share nothing but the four-digit reference.		Rolex reused the reference number. In 1940, the firm fitted a Valjoux-22 antimagnetic chronograph movement into a completely different case and stamped it ref 3666. [https://www.phillips.com/auctions/watches Phillips] has sold that watch under catalog number CH080216 for CHF 162,500. It is a waterproof-cased chronograph with a tachymeter scale, pump pushers, and a round steel case in the 35–37 mm range, visually and mechanically unrelated to the 1924 Hermetic. The two watches share nothing but the four-digit reference.

	~~The reuse pattern is standard for~~ Rolex ~~of the 1920s to 1940s. Four~~-digit references ~~were assigned as new cases entered the catalog~~, ~~and once~~ a ~~case was discontinued its number could be reassigned to a later, unrelated watch~~. The ~~Hermetic 3666 fell out of production by~~ the ~~late~~ 1920s when the Oyster obsoleted the architecture; the number sat unused for over a decade before being applied to the 1940 chronograph. Any dealer listing for a 3666 should be cross-checked against the movement. A 9½-ligne Hunter-type caliber with no chronograph function, ~~encased in~~ a ~~hermetic double case, is the 1924 Submarine. A~~ Valjoux~~-22~~ chronograph ~~in a single-piece waterproof case is~~ the 1940 reference~~. Two different watches, one shared number~~.		Rolex reused four-digit references regularly in this era, so a 3666 can mean two totally different watches. The movement settles it fast: a small Hunter movement means the 1920s Hermetic, a Valjoux chronograph means the later 1940 reference.

	<span id="collecting-considerations"></span>		<span id="collecting-considerations"></span>

Admin: Tighten another tier of dense reference prose

2026-04-24T02:37:01Z

Tighten another tier of dense reference prose

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	<small>Submarine -> '''3666'''</small>		<small>Submarine -> '''3666'''</small>

	The 3666 is a pre-Oyster~~. Before~~ Rolex ~~settled on~~ the ~~three-piece screwed case~~ that ~~defined everything from late 1926 onward~~, ~~Hans Wilsdorf (the founder who had registered the Rolex trademark~~ in ~~1908 and still ran~~ the British firm Wilsdorf & Davis) was already selling waterproof wristwatches under a name the modern collector will find startling: Rolex Submarine. The trademark was registered in Switzerland on 31 March 1922, thirty-~~one years before the 1953 Submariner dive~~ watch ~~picked it up again, and with no historical continuity between the two~~. ~~The 3666~~ is ~~a documented~~ example of ~~that earlier Submarine line, dated 1924, built on Jean~~ Finger~~'s Swiss patent CH 89276 for a hermetic~~ double case~~. It is the direct operational precursor to~~ the Oyster~~, and the watch that showed Wilsdorf why the Oyster was needed~~.		The 3666 is a pre-Oyster Rolex Submarine in the original 1920s sense of that name, not in the later dive-watch sense. It is the clearest surviving example of the Finger double-case system Rolex sold before the Oyster replaced it.

	<span id="core-facts"></span>		<span id="core-facts"></span>
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	The inner caseback, where visible after disassembly, is typically signed W&D, the mark of Wilsdorf & Davis, the firm's legal name in Britain before the 1919 rebrand to Rolex. W&D stamps appear on Rolex-era pieces into the mid-1920s as a legacy supplier convention. On the Hermetic, they confirm the inner case originated in the Wilsdorf retail chain rather than through a third-party assembly.		The inner caseback, where visible after disassembly, is typically signed W&D, the mark of Wilsdorf & Davis, the firm's legal name in Britain before the 1919 rebrand to Rolex. W&D stamps appear on Rolex-era pieces into the mid-1920s as a legacy supplier convention. On the Hermetic, they confirm the inner case originated in the Wilsdorf retail chain rather than through a third-party assembly.

	~~There are no crown guards. There is no screw-down crown in~~ the ~~Oyster sense. There is no gasket at any winding or setting interface, because~~ the ~~watch has no exposed winding or setting interface while assembled. The seal is~~ entirely ~~at the outer bezel thread and the outer case body join~~. ~~For its era, this~~ made ~~the Hermetic~~ genuinely ~~waterproof in a way the contemporary stem~~-~~sealing efforts of Borgel and Taubert were not. The absence of a stem beats the best stem seal. For practical daily use~~, ~~it is almost unusable. The time must be set by~~ disassembly. The ~~watch must be wound by disassembly. Reassembly requires precision threading of a small bezel onto~~ a ~~small case, with the inner case correctly re-seated inside the outer. Wilsdorf knew the ergonomics were unacceptable. Within five~~ years ~~he would commission the Oyster~~.		The Hermetic solved water resistance by removing the exposed stem from the problem entirely. That made it genuinely water-resistant for its day, but awkward to live with: every winding or setting operation meant partial disassembly. The Oyster solved exactly that usability problem a few years later.

	<span id="dimensions"></span>		<span id="dimensions"></span>

Admin: Finish remaining dense reference prose

2026-04-24T02:01:57Z

Finish remaining dense reference prose

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	The 3666 is Rolex selling Jean Finger's Hermetic double-case idea through its own network. Finger developed the architecture and made the surviving cases. Rolex commercialized it. That is the cleanest way to read the credit.		The 3666 is Rolex selling Jean Finger's Hermetic double-case idea through its own network. Finger developed the architecture and made the surviving cases. Rolex commercialized it. That is the cleanest way to read the credit.

	Production of ~~ref~~ 3666 ~~runs from approximately~~ 1924 ~~onward. The reference sits~~ inside the broader ~~Rolex "~~Hermetic" catalog, which Wilsdorf also marketed under the "Submarine" name and under several alternate brands (Aqua and the early Oyster Watch Co. antecedents) in parallel, with the same architecture re-badged for different retail channels. ~~The Hermetic line~~ ends ~~once~~ the Oyster ~~three-piece~~ case ~~is commercialized~~ in late 1926~~. The Oyster sealed its crown directly through a screw-down stem, opened from a single back for service,~~ and ~~allowed daily winding without disassembly. It obsoleted~~ the double case ~~immediately. Nothing about the Hermetic~~ architecture ~~survives into later Rolex production~~. What ~~does survive~~ is the ~~trademark. The~~ 1922 "Rolex Submarine~~" registration sat dormant for three decades and returned~~ in 1953 on a ~~very~~ different watch.		Production of the 3666 starts around 1924 inside the broader Hermetic line. That chapter ends as soon as the Oyster case arrives in late 1926 and makes the double-case architecture obsolete. What survives is the name: the 1922 Rolex Submarine trademark returns in 1953 on a completely different watch.

	<span id="the-double-case-architecture"></span>		<span id="the-double-case-architecture"></span>
	== The double-case architecture ==		== The double-case architecture ==

	The 3666 is ~~two watches, one~~ inside ~~the other~~. The ~~outer~~ case ~~is a round steel or precious-metal shell~~, ~~approximately 32 mm across, with soldered wire lugs~~ and a ~~smooth body. Its top is~~ a ~~heavy~~ screw-down bezel ~~that closes onto the outer case's main body through a fine thread, sealed by a flat mineral crystal~~. ~~Unscrewed~~, the ~~bezel lifts away and exposes~~ the ~~second watch inside, a small complete inner~~ case ~~of roughly 21 mm diameter containing~~ the ~~movement. This~~ inner ~~case has no crown pendant in the conventional wristwatch sense~~. ~~Winding is accomplished by a small pendant winder at the top of the inner case, accessible only after the outer bezel~~ is ~~removed. The inner case has no opening back either;~~ the ~~movement is permanently sealed inside it,~~ and ~~service requires a watchmaker to work through the pendant-end access used for winding, or to physically cut the case open~~.		The 3666 is a watch inside a watch. The movement sits in a sealed inner case, and that inner case sits inside a larger protective shell closed by a screw-down bezel. To wind or set it, the owner has to open the outer case and remove the inner one. That is what makes the design both ingenious and inconvenient.

	The inner caseback, where visible after disassembly, is typically signed W&D, the mark of Wilsdorf & Davis, the firm's legal name in Britain before the 1919 rebrand to Rolex. W&D stamps appear on Rolex-era pieces into the mid-1920s as a legacy supplier convention. On the Hermetic, they confirm the inner case originated in the Wilsdorf retail chain rather than through a third-party assembly.		The inner caseback, where visible after disassembly, is typically signed W&D, the mark of Wilsdorf & Davis, the firm's legal name in Britain before the 1919 rebrand to Rolex. W&D stamps appear on Rolex-era pieces into the mid-1920s as a legacy supplier convention. On the Hermetic, they confirm the inner case originated in the Wilsdorf retail chain rather than through a third-party assembly.