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Omega Seamaster Cosmic 2000 Ref. 166.128 c.1972

Vintage Omega Seamaster Cosmic 2000 watch with silver dial and steel bracelet, showing an engraved caseback. - view 1
1/2

Estimated value

$450 - $850

Rarity

Average(4/10)

Category

Watches

Brand

Omega

Era

1972-1975

Origin

🇨🇭 Switzerland

Authenticity

High(75%)
52

OMEGA SEAMASTER COSMIC 2000 REF. 166.128 C.1972: IDENTIFICATION

Stainless steel Omega Seamaster Cosmic 2000 featuring a silvered sunburst dial with applied faceted baton indices and a date window at 3 o'clock. The 38mm integrated case design is characteristic of early 1970s Omega production, featuring a press-fit subterranean movement housing. The dial shows 'Seamaster Cosmic 2000' branding below the center pinion. It is fitted with a multi-link stainless steel bracelet, though the end-link fitment suggests potential aftermarket replacement or significant spring-bar wear.

Compare with other watches in the archive: Omega Speedmaster Professional Ref. 310.30.42.50.01.001 (Hesalite) c.2021-2024, Angus & Coote 'Faithful Lever' Pocket Watch (Elgin Movement) c.1915, Baume & Mercier Geneve Ladies Wristwatch c.1970s.

PRODUCTION & REFERENCE HISTORY

Introduced in 1972, the Cosmic 2000 represented Omega's effort to modernize the Seamaster line with a more robust, oversized case design. These models utilized a unique 'case-in-case' construction where the movement is held in a secondary inner container secured by large O-ring gaskets to improve ...
Introduced in 1972, the Cosmic 2000 represented Omega's effort to modernize the Seamaster line with a more robust, oversized case design. These models utilized a unique 'case-in-case' construction where the movement is held in a secondary inner container secured by large O-ring gaskets to improve water resistance. This specific reference typically houses the Caliber 1012 automatic movement, a high-beat 28,800 bph caliber that marked Omega's transition toward thinner, mass-produced movements during the onset of the Quartz Crisis.

COLLECTOR NOTES

1

The 1972 Cosmic 2000 used a unique mineral crystal that was pressed into a large Teflon gasket, a technical departure from the acrylic crystals used in previous Seamaster generations.

SCARCITY

Average55-70%
CommonLegendary

Typical antique shop fare. Requires some searching but regularly available. This is where most genuine antiques fall.

Rarity 4/10. Curiosa currently catalogues 11 watches items at rarity 4 or higher.

Typical Characteristics

  • Standard antique shop items
  • Regularly available
  • Moderate collector interest

Confidence Factors

  • Dial printing and index application appear consistent with Omega factory standards for the 1012-series era
  • Engraving on caseback is common for retirement or service gifts but requires movement verification
  • Bracelet end-links appear to be a poor fit, possibly non-original
How does authenticity detection work?

WATCHMAKER'S ASSESSMENT

Vintage Watchmaker & Horology Specialist

Horologist

Identification is high based on case and dial architecture, though movement and original bracelet status remain unverified by photos.

KEY EVIDENCE

  • 1Case geometry matches Ref. 166.128 specifications.
  • 2Dial signature uses correct serif typography for early 1970s Omega production.
  • 3Seahorse caseback medallion displays correct detail definition for the press-fit era.
  • 4Applied indices show correct black-top inserts characteristic of the Cosmic range.

UNCERTAINTIES

  • •Bracelet end-links are improperly sized for these lugs, suggesting a generic replacement.
  • •Caseback engraving 'T.H.O.R' is non-factory and reduces collector desirability.

WHAT WOULD IMPROVE CERTAINTY

  • →Open inner capsule to verify Caliber 1012 or 1022 movement and serial number.
  • →Check for the presence of the original Omega-signed crown.
  • →Measure lug width to confirm if bracelet is 19mm or 20mm.

CONDITION & GRADE

Good - Dial aged, case engraved, bracelet loose

Grading breakdown

Fair market value is tempered by the personalized engraving and the significant gap between the bracelet end-links and the lug shoulders.

Condition

Caseback features a localized 'T.H.O.R' engraving which impacts resale value. Bracelet end-links appear loose and do not sit flush with the lugs. Dial exhibits light oxidation near the 9 o'clock marker.

Weight & feel

Substantial for its era due to the 38mm steel 'jumbo' case and integrated movement capsule design.

WATCH MARKET VALUE

$450 - $850

Updated: May 11, 2026

Who buys this

Vintage Omega enthusiasts looking for 1970s 'jumbo' cases and entry-level luxury collectors.

What increases value

  • •Large 38mm case size appeals to modern wearing preferences
  • •Functioning automatic day-date or date complication
  • •Original silver sunburst dial condition

What lowers value

  • •Caseback engraving significantly limits resale to the broader market
  • •Aftermarket or poorly fitted bracelet
  • •Cost of servicing the complex 'case-in-case' construction

What makes top-tier examples

  • •Unpolished case edges
  • •Original signed crystal with tiny Omega logo etched in the center
  • •Correct Ref. 1198/195 bracelet

Grade & condition

Case sharpness, dial freckling, movement service history, and engraving presence.

Rarity & demand

AverageModerate demandModerate liquidity
Browse similar watches objects

For informational purposes only, not a formal appraisal.

FROM THE CABINET OF

SE

Sebastiaan
Wonderseeker•1 item

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