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Doxa Sub 300T Professional (Synchron Era) "Aqua-Lung", 1970s — view 1 of 6
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Wristwatches · Wristwatch

Doxa Sub 300T Professional (Synchron Era) "Aqua-Lung", 1970s

DocumentedDocumented from a dealer's listing; attribution and date as stated by the dealer.
Maker / attribution
Unrecorded in source
Date
1970s
Country of origin
Unrecorded in source
Object type
Wristwatch
Dimensions
Case 42 mm
Stock no.
DXPRO300TAL
Credit line
Dealer listing, Craft & Tailored (DXPRO300TAL)
Catalogue title (original)
1970s DOXA Sub 300T Professional (Synchron Era) "Aqua-Lung" (English)

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Record summary

Catalogued by Craft & Tailored (dealer), Los Angeles (stock number DXPRO300TAL), this is a wristwatch, dated 1970s. The Atlas places it in the Quartz Revolution period (1969 – 1990) of its Wristwatches collection. Recorded dimensions: Case 42 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 — Craft & Tailored

Doxa S.A. was founded in 1889 by Georges Ducommun as a maker of dress watches and other timepieces. In the late 1960s, Doxa decided to dedicate resources to produce a timepiece to be used exclusively for diving. Doxa consulted with various Navy dive teams and divers including Jacques Cousteau who was then chairman of "U.S. Divers." Doxa's innovative watches were quickly adopted by both commercial and military divers. Jacques Cousteau, who at the time was the head of U.S. Divers, was so impressed by the Doxa Sub300T that he became a distributor of the reference in the United States and co-branded the dial of the Sub300T with the U.S. Divers logo. The Doxa company went through many acquisitions and changed ownership a few times over the years. Synchron bought Doxa in the late 1960s and added the brand to a group that also included Ernest Borel and Cyma, and was purchase again in 1978 by the Aubry Freres Company. The second-generation or “Synchron Era" as many refer to it, was aimed to be the watch of choice for the emerging recreational diving community. With sturdy cases, high visibility dials and smart bezel design, the Synchron era Doxa Subs quickly became the watch of choice for recreational divers in both America and Europe. This specific DOXA Sub 300T Professional cosigned "Aqua-Lung" was originally retailed by U.S. Divers Co. and is a true collector's item. Doxa Subs are adored by the "Golden Era" dive watch enthusiasts and this Professional 300T represents the era perfectly. SPECS Stock # DXPRO300TAL Brand DOXA Style SUB Model Sub 300T Professional Serial N/A Size Men's Material SS Dial Orange "Aqua-Lung" Millimeters 42mm Bracelet Synchron "Beads of Rice" Micro Adjust Stretch Bracelet CASE & BRACELET The unpolished Doxa Sub 300T case is sharp, showing original factory finishing with honest wear. The stainless steel bezel shows some wear, retaining most of its orange enamel. The case retains its original Synchron signed crown. The original mineral glass crystal exhibits honest wear from use. The original Synchron signed "bead of rice" stretch bracelet features a unique ratcheting micro-adjust divers extension within the clasp, the bracelet shows light wear. DIAL & HANDS The high visibility orange Professional dial is cosigned "Aqua-Lung" for U.S. Divers Co. remains in wonderful vintage condition. The original tritium lume plots have aged to a wonderful creamy yellow coloration and exhibit no degradation under U.V. light inspection. The original black Doxa hands match the dial perfectly, under U.V. light inspection the hour and minute hands remain fully intact showing no degradation, the sweep seconds hand lume has been previously restored. ACCESSORIES None. The watch is running at spec and is in perfect working condition.

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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