
Wristwatches · Wristwatch
Omega Seamaster 120 ref. 166.073, 'IDF' Issued
- Maker / attribution
- Omega (maker)
- Date
- c. 1973
- Historical period
- Quartz Revolution (1969 – 1990)
- Country of origin
- Switzerland
- Object type
- Wristwatch
- Stock no.
- OC2827
- Credit line
- Dealer listing, Oliver & Clarke (OC2827)
- Catalogue title (original)
- Omega Seamaster 120 Ref. 166.073 - 'IDF' Issued w/ Extract (English)
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Record summary
Catalogued by Oliver & Clarke (dealer), United Kingdom (stock number OC2827), this is a wristwatch by Omega, made in Switzerland, dated c. 1973. 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 — Oliver & Clarke
The Omega Speedmaster is one of the most historically important, if not the most important wrist watch ever produced, full stop. Its story can be summed up with one simple acronym: NASA. Surely, this is not a watch that needs an introduction with our audience... However, the sibling to the Speedmaster, the Seamaster, is worth shedding some light on. The model family was conceived in 1948 as what was effectively a time-only watch, not the dive watch that is most commonly associated with the named today. It wasn't until nearly a decade later where the Seamaster 300 would show up with its rotating timing bezel and larger case size. As with so many other icons and popular vintage models, the Seamaster has seen countless iterations and variants over its nearly 70-years of continuous production, but it is the 300 that is probably what comes to mind when you hear the name. The piece that we have here today is a Seamaster 120, but not just any Seamster 120... This Reference 166.073 is not only an attractive piece of 1970's dive watch design, but is also a military-issued example. Dating to circa 1973, this piece is offered in strong condition given its past history, with a strong 'cushion' case that shows normal wear with no signs of previous polishing. The bi-directional rotating bezel assembly houses a black acrylic insert, featuring full graduations throughout with a triangle at the 12 o'clock position. The screw-down caseback bears the traditional Hippocampus with an Omega logo — as does the signed crown. Inside, the matte black dial is exceptionally well-preserved, with very attractive and evenly patinated Tritium plots, applied 'faceted' indices, and a framed date aperture. The handset matches the dial nicey and is of the 'sword' style, which is a design characteristic borrowed from the Seamaster 300 issued to the British Military that predates this piece. Powering this piece is Omegas Cal. 565 automatic-winding movement. This piece, on its own, would be a treasure, a real piece of horological history. But it gets better! Accompanying this piece is an extract from Omega's archives confirming production on 6/29/1973 and delivery to the Israeli Defense Forces. Not only is this a piece of history, but when compared to other military-issued pieces from other brands, this actually is fantastic value, and they sure don't grow on trees.
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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