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Citizen Dive Watch (Ref. 51-2273), 1980 — view 1 of 6
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Citizen Dive Watch (Ref. 51-2273), 1980

DocumentedDocumented from a dealer's listing; attribution and date as stated by the dealer.
Maker / attribution
Citizen (maker)
Date
1980
Country of origin
Japan
Object type
Wristwatch
Stock no.
CZNDW512273
Credit line
Dealer listing, Craft & Tailored (CZNDW512273)
Catalogue title (original)
1980 Citizen Dive Watch (Ref. 51-2273) (English)

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Record summary

Catalogued by Craft & Tailored (dealer), Los Angeles (stock number CZNDW512273), this is a wristwatch by Citizen, made in Japan, dated 1980. The Atlas places it in the Quartz Revolution period (1969 – 1990) of its Wristwatches collection. 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 — Craft & Tailored

Founded in 1918 in Japan, Citizen is one of the most integrated manufacturers in the watch world. They make all of their watch components in-house and do not have any manufacturing facilities outside the brand's home country. With a history of cutting-edge technology, Citizen is known for their incredibly accurate and rugged timepieces. In fact, the brand engineered Japan's first waterproof watch in 1959, six years before Seiko launched the 62MAS. Twenty-one years later, this ref. 51-2273 came into being and continued the friendly competition between Japan's two biggest watchmakers. It's considered to be among the best of Citizen's vintage automatic tool watches, and serves as a fantastic, under-the-radar alternative to the famous Seiko 6309 "Turtle." The 51-2273 also has a proven history, with examples known to have served with the Argentine Navy’s Tactical Divers, adding real military credibility to an otherwise modest watch. For collectors of early Japanese tool watches, the 51-2273 is an accessible and characterful alternative to the usual Seiko picks, and a natural first step into vintage Citizen. SPECS Stock # CZNDW512273 Brand Citizen Style Diver Model 51-2273 Serial 006XXXXX Size Men's Material Stainless Steel Dial Matte Black Millimeters 40 Strap 2pc Handmade Leather CASE & BRACELET The thick case shows minimal signs of use and has been lightly polished in the past, retaining full lugs. The deep black bezel is in great condition with minor marks from wear. The case retains its original, unsigned crown. The caseback engravings are deep and legible. The watch comes fitted with a two-piece handmade canvas strap. DIAL & HANDS The rich matte black dial is in excellent condition, exhibiting no signs of aging or blemishes. The lume plots and hands feature a vibrant teal color and are all intact and in beautiful condition. The lume reveals no degradation under UV light inspection. The date window shows slight signs of age, with the font in legible condition. ACCESSORIES None. The watch is functioning and keeping time perfectly, previous service history is unknown. A movement service can be purchased upon request.

Historical context

Quartz Revolution (1969 – 1990)

Seiko's Astron begins mass quartz timekeeping; traditional industries contract sharply.

Quartz and digital watches transformed the market after 1969. Swiss employment collapsed, Japanese and Hong Kong production soared, and the Swatch (1983) helped the Swiss industry recover; mechanical watches survived as luxury goods.

Read the period in the timelineMore wristwatches from this periodEarlier: Modern Mechanical Horology

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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