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Aquadive Automatic (Ref. 503.305) "Monnin Case", 1970s — view 1 of 6
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Wristwatches · Wristwatch

Aquadive Automatic (Ref. 503.305) "Monnin Case", 1970s

DocumentedDocumented from a dealer's listing; attribution and date as stated by the dealer.
Maker / attribution
Aquadive (maker)
Date
1970s
Country of origin
Unrecorded in source
Object type
Wristwatch
Dimensions
Case 42 mm
Stock no.
AD503305
Credit line
Dealer listing, Craft & Tailored (AD503305)
Catalogue title (original)
1970s Aquadive Automatic (Ref. 503.305) "Monnin Case" (English)

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Record summary

Catalogued by Craft & Tailored (dealer), Los Angeles (stock number AD503305), this is a wristwatch by Aquadive, 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

The 1960s and 1970s are filled to the brim with dive watches routinely referred to by a singular and possibly overused, but inescapable word, "funky". It seems to be the only signifier in the English language that can properly capture an aesthetic which while highly particular, is also quite wide in its spectrum. Here we have a fantastically designed Aquadive, ref. 503.305, which sits perfectly somewhere in the middle of that spectrum. Stock # AD503305 Brand Aquadive Style Automatic Diver Model 503.305 Serial 10835 Size Men's Material Stainless Steel Dial Matte Black/ Orange Millimeters 42 Bracelet 2pc Handmade Leather Strap CASE & BRACELET The watch features a sizeable 42mm stainless steel case, more precisely the famous "Monnin Case". The Monnin style case gets its name from the famous Heuer 844, the brand's first dive watch which they outsourced to a French company, I hope you guessed it, Monnin. After more or less saving Heuer during the Quartz Crisis, the case design language took off and was used by many brands including Zodiac, Technos, CWC, and as seen here, Aquadive. While lightly worn, the unpolished case retains sharp lines, bevels, and its amazing tapered crown guards. The watch is supplied on a 2pc leather strap. DIAL & HANDS The dial is where the real funk comes in. The combination of colors interweaves to create a truly unique feel. The dial starts black in the center but quickly reaches a tangerine inner ring which is periodically broken by the long tritium hour markers. These markers run all the way to the end of the dial, cutting their way through a lightly aged grey outer seconds track. The design layering is really something to see in person. It's then topped off by a bright orange seconds hand with its huge diamond block of aged tritium, and day and date wheel in a mix of red and black. ACCESSORIES

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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