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Stainless steel Rolex Bubbleback Oyster Perpetual bracelet watch, 1940 — view 1 of 2
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Wristwatches · Wristwatch

Stainless steel Rolex Bubbleback Oyster Perpetual bracelet watch, 1940

DocumentedDocumented from a dealer's listing; attribution and date as stated by the dealer.
Maker / attribution
Rolex (maker)
Date
1940
Country of origin
Switzerland
Object type
Wristwatch
Materials / technique
stainless steel
Dimensions
Case 31 mm
Stock no.
G3366
Credit line
Dealer listing, Somlo Antiques (G3366)
Catalogue title (original)
Stainless steel Rolex Bubbleback Oyster Perpetual bracelet watch. Made 1940 (English)

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Record summary

Catalogued by Somlo Antiques (dealer), London (stock number G3366), this is a wristwatch by Rolex, made in Switzerland, dated 1940. The Atlas places it in the Golden Age of Mechanical Watchmaking period (1900 – 1945) of its Wristwatches collection. Materials and techniques recorded by the source: stainless steel. Recorded dimensions: Case 31 mm. The record is illustrated with 2 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 — Somlo Antiques

Rolex created the auto-rotor movement from the Aegler movement in Hunter watches that featured a “perpetual motion” winding mass. Rolex subsequently patented its first successful perpetually self-winding wristwatch in 1932 and the Bubble Back was introduced in 1933 and featured the first auto-rotor. Brand: Rolex Made: 1940 Model: Oyster Perpetual Reference: 2940 Calibre: 9 3/4''' Movement: Automatic Material: Stainless steel Features/complications: Bubble back Dial: Silvered dial with outer minute track featuring luminous hour indices with luminous Oyster hour and minute hands and sweep centre centre seconds Case dimensions: 31mm Bracelet/strap: Stainless steel bracelet Accessories: N/A SKU: 3366

Historical context

Golden Age of Mechanical Watchmaking (1900 – 1945)

The wristwatch displaces the pocket watch; waterproof cases, self-winding and grand complications.

The wristwatch overtook the pocket watch. Military use in the First World War, aviation, water-resistant cases (1926), automatic winding (1923–31), rectangular Art Deco designs and early chronographs and calendars defined the period.

Read the period in the timelineMore wristwatches from this periodEarlier: Industrial Revolution

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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