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Tudor "Snowflake" Submariner (Ref. 7021/0) Blue Dial W/ Roulette Date, 1970 — view 1 of 6
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Wristwatches · Wristwatch

Tudor "Snowflake" Submariner (Ref. 7021/0) Blue Dial W/ Roulette Date, 1970

DocumentedDocumented from a dealer's listing; attribution and date as stated by the dealer.
Maker / attribution
Tudor (maker)
Date
1970
Country of origin
Switzerland
Object type
Wristwatch
Stock no.
TDRSUB7021
Credit line
Dealer listing, Craft & Tailored (TDRSUB7021)
Catalogue title (original)
1970 Tudor "Snowflake" Submariner (Ref. 7021/0) Blue Dial W/ Roulette Date (English)

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Record summary

Catalogued by Craft & Tailored (dealer), Los Angeles (stock number TDRSUB7021), this is a wristwatch by Tudor, made in Switzerland, dated 1970. 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

The Tudor “Snowflake” is the nickname given to the Tudor Submariners that have distinct features like square hour markers and a unique handset where the hour hand resembles a snowflake, hence the nickname. Rolex/Tudor introduced this dial and hand configuration to increase visibility in low-light conditions. The Tudor Snowflakes were produced from 1968 to the mid-1980s and were made with either black or blue dial colorations. The Snowflakes were also made with or without a date complication. The Tudor Snowflake Submariners, much like the other Submariners produced by Rolex and Tudor, have a long-standing history and were supplied to military forces, including the U.S. Navy, the Marine Nationale (French Navy), and the RCN (Royal Canadian Navy). Marine Nationale Diver Wearing Turdor Submariner "Snowflake"7016/0 SPECS Stock # TDRSUB7021 Brand Tudor Style Submariner "Snowflake" Model 7021/0 Serial 74XXXX Size Men's Material Stainless Steel Dial Matte Blue Millimeters 40 Strap Blue/Grey Phoenix NATO Strap CASE & BRACELET The impressive case boasts thick dimensions and broad factory chamfers, while exhibiting honest wear from use and no notable evidence of being previously polished. The original blue Mk III "fat font" bezel insert features a lovely light blue/grey fade while retaining visible numerals and the tritium pearl, with nominal wear present. The case retains its original Rolex-signed 7mm twin-lock crown. The case back retains crisp factory engravings and features minimal wear. The watch comes supplied on a new blue/grey Phoenix NATO strap. DIAL & HANDS The original matte dark blue dial has achieved a lovely vintage aesthetic and features the recognized "bubbling" patina that is commonly seen on Tudor dials of this era. The tritium lume plots have achieved an attractive dark custard, almost brown patina, and exhibit no degradation under UV light inspection. The original tritium hands have aged to a warm ivory patina and exhibit no degradation under UV light inspection. The alternating red-and-black “roulette” date wheel remains original to the watch. 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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