
Wristwatches · Wristwatch
Tudor 'Big Crown' Submariner Ref. 7924, 1958
- Maker / attribution
- Tudor (maker)
- Date
- 1958
- Historical period
- Modern Mechanical Horology (1945 – 1969)
- Country of origin
- Switzerland
- Object type
- Wristwatch
- Dimensions
- Case 37 mm
- Stock no.
- Product 1401008717911
- Credit line
- Dealer listing, S.Song Watches (product 1401008717911)
- Catalogue title (original)
- Tudor 'Big Crown' Submariner Ref. 7924 (English)
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Record summary
Catalogued by S.Song Watches (dealer), Seattle (stock number Product 1401008717911), this is a wristwatch by Tudor, made in Switzerland, dated 1958. The Atlas places it in the Modern Mechanical Horology period (1945 – 1969) of its Wristwatches collection. Recorded dimensions: Case 37 mm. The record is illustrated with 6 photographs.
Assembled from the source record's structured fields. Dates and attributions are given as the source states them; where a field is missing the Atlas leaves it blank rather than estimating.
Catalogue description
Dealer description — S.Song Watches
This Tudor 7924 Submariner is a testament to that. Nicknamed the ‘Big Crown’ due to its unusually large 8mm ‘Brevet’ crown, this is perhaps one of the holy grails of vintage Tudor. The Tudor 7924 was released in 1958 and was one of the earliest dive watches made by Tudor, with only the Ref. 7922 and 7923 coming before it. All of these references were seen as experimental by Tudor as they were not featured in sales catalogues at the time. This makes the Tudor 7924 an extremely rare watch with very low production numbers. Aesthetically, you will be able to see the correlation between this Submariner and the one produced by Rolex, particularly the latter’s own version of the ‘Big Crown’, the James Bond Ref. 6538. With a glossy gilt dial and the classic black Submariner bezel, this Tudor is housed in a 37mm stainless steel case. I must say, the 8mm big crown really makes a difference to the overall look of the watch, giving it a muscular appeal. Early Submariners, both from Rolex and Tudor are defined by their lack of crown guards and this 7924 is a perfect example of this. While the Tudor looks exactly like the Rolex, the only difference lies in the movement, with the 7924 powered by a self-winding Cal. 390. Everything else uses Rolex parts, so you know that this watch is pure quality. This particular example has developed a beautiful tropical dial, making it even rarer than it already is and while it has been worn well over the course of its lifetime, this is a grail piece nevertheless and something you will not see very often.
Historical context
Modern Mechanical Horology (1945 – 1969)
Tool watches for divers, pilots and astronauts; electric watches anticipate the electronic age.
The classic era of the mechanical wristwatch: dive watches, chronographs for motor racing and space flight, GMT watches for jet travel, slim dress watches, automatic calendars, and the rise of Japanese manufacturers alongside Swiss, American, German and Soviet industries.
Read the period in the timelineMore wristwatches from this periodEarlier: Golden Age of Mechanical Watchmaking
Atlas type guide
Dive and water-resistant watches
Keeping water and dust out of a wristwatch was a long-standing challenge. Rolex's screw-down Oyster case (1926) and Omega's Marine (1932) were landmarks; in the early 1950s Blancpain's Fifty Fathoms and Rolex's Submariner defined the professional dive watch with rotating bezels for timing dives, luminous dials and high water resistance. The ISO 6425 standard (1982) later codified what a 'diver's watch' must do.
Dive watches became icons of post-war design and exploration, and their evolution — helium escape valves, ceramic bezels, saturation-diving depth ratings — records the history of underwater work.
What to look for
- Unidirectional or bidirectional rotating bezel with minute markings.
- Screw-down crown and case back; depth rating printed on the dial.
- Luminous hands and markers (radium before c. 1960, tritium c. 1960–1998, then Super-LumiNova).
- Reference numbers on the case between the lugs or inside the back.
Dating clues
- Screw-down Oyster cases: from 1926.
- Professional dive watches: from 1953.
- Tritium 'T' marks on dials: c. 1960–1998.
General guidance written by the Atlas editors about this kind of object. It is not a statement about this particular piece; for that, rely on the source record above and on physical examination.
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