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Piaget Tank Onyx and Diamond Dial Ref 90802, c. 1980 — view 1 of 6
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Wristwatches · Wristwatch

Piaget Tank Onyx and Diamond Dial Ref 90802, c. 1980

DocumentedDocumented from a dealer's listing; attribution and date as stated by the dealer.
Maker / attribution
Piaget (maker)
Date
c. 1980
Country of origin
Switzerland
Object type
Wristwatch
Dimensions
Case 33 mm
Stock no.
W-2599
Credit line
Dealer listing, Bulang & Sons (W-2599)
Catalogue title (original)
Piaget Tank Onyx and Diamond Dial Box and Papers Ref 90802 (English)

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

Record summary

Catalogued by Bulang & Sons (dealer), Copenhagen (stock number W-2599), this is a wristwatch by Piaget, made in Switzerland, dated c. 1980. The Atlas places it in the Quartz Revolution period (1969 – 1990) of its Wristwatches collection. Recorded dimensions: Case 33 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 — Bulang & Sons

Piaget is having something of a revival at the moment and especially with its stone dial watches, which are always highly sought after by collectors. This is a beautiful watch in yellow gold has a fascinating onyx and diamond dial and maybe the coolest strap ever… The yellow gold Tank-form case is in excellent condition. The dial is in onyx with diamonds in the centre with no lume and matching dauphine hands. The watch comes on the original black Piaget leather strap with integrated yellow gold ‘H’ sections and it is that is fitted with the original gold Piaget buckle. The watch comes as a complete set a nice shaped high quality wooden box, hangtag, polishing cloth, card holder, booklets and the original card with both reference and serial numbers. The Piaget 9P2 manual wind movement has been fully serviced by our watchmaker. Please reach out to us to find out more about this classy dress watch. We love talking to you guys! Specifications: -Reference 90802 -33mm x 29mm yellow gold case -6724xxx serial number dating to circa 1980 -Onyx and diamond dial -Comes on Piaget leather strap with Piaget gold buckle -Piaget 9P2 manual wind movement -Box, hangtag, cloth, card holder, booklet, original card -Fully serviced by our watchmaker -Includes a handmade leather watch pouch

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

Wristwatches

Bracelet watches were worn by women from the early nineteenth century — Breguet made one for Caroline Murat, Queen of Naples, in 1810–12 — but the wristwatch only became a man's instrument with military use and aviation in the early twentieth century. Between the World Wars it overtook the pocket watch; the 1920s and 1930s brought rectangular Art Deco cases, water-resistant cases and the first automatic winding systems.

After 1945 the wristwatch became a carrier of identity — dress watches, sports and dive watches, chronographs, calendars — produced by Swiss, American, Japanese, German, Soviet and Chinese industries. The quartz revolution after 1969 and the mechanical renaissance since the 1990s, including the rise of independent watchmakers, complete the story.

What to look for

  • The reference number (between the lugs or inside the case back) and serial number, the starting point for dating.
  • The calibre: its maker and number are often stamped under the dial or on the bridge.
  • Originality of dial, hands and crown — refinished ('redial') dials are common.
  • Case material marks: 18K/750, 14K/585, stainless steel, gold-filled, plated.

Dating clues

  • Wire-lug cases: before c. 1925.
  • Water-resistant screw-down cases: from 1926.
  • Quartz movements: from 1969; sapphire crystals widespread after c. 1980.

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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