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Tudor Submariner Diver Automatic Plexi, ref. 7928, 1966 — view 1 of 6
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Wristwatches · Wristwatch

Tudor Submariner Diver Automatic Plexi, ref. 7928, 1966

DocumentedDocumented from a dealer's listing; attribution and date as stated by the dealer.
Maker / attribution
Tudor (maker)
Date
1966
Country of origin
Switzerland
Object type
Wristwatch
Materials / technique
Stainless steel
Dimensions
Diameter 40 mm (without crown)
Stock no.
gm975
Credit line
Dealer listing, Vintage Portfolio (gm975)
Catalogue title (original)
Vintage Tudor Submariner Diver Automatic Automatik Ref 7928 Plexi from 1966 (English)

View the source record (dealer listing) ↗ (opens another website in a new tab)Suggest a correction

Record summary

Catalogued by Vintage Portfolio (dealer), Vienna (stock number gm975), this is a wristwatch by Tudor, made in Switzerland, dated 1966. The Atlas places it in the Modern Mechanical Horology period (1945 – 1969) of its Wristwatches collection. Materials and techniques recorded by the source: Stainless steel. Recorded dimensions: Diameter 40 mm (without crown). 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 specification — Vintage Portfolio

Movement: automatic with centre seconds; Dial: black; Case: stainless steel; Crown: Genuine Tudor (signed); Glass: Sapphire (factory original); Diameter: 40 mm (without crown); Strap: real leather (brown); Dial condition, as described by the dealer: The still factory original (non-refurbished) dial has slight patina.

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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