Vintage Omega Seamaster Automatic Gold Mint+ [REF. 166.0204]

Elegant Seamaster in exceptional mint+ condition

The Omega Seamaster Automatic Ref. 166.0204 from 1978 is presented in outstanding mint+ condition. The gold-plated case with its gold-colored dial embodies the elegant design language of the late 1970s. The watch was fully serviced by us in January 2026 and is impressive both visually and technically. The original Omega-signed acrylic crystal is a particularly noteworthy feature.

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Condition and overall impression

This Seamaster is in exceptionally good condition. The case, bezel, and dial are virtually flawless; the watch has a very fresh and high-quality appearance overall. Its timekeeping is significantly above average, underscoring the quality of its recent service.

Condition overview:

• Case: Mint
• Bezel: Mint
• Glass: Like new (original Omega)
• Accuracy: Mint
• Movement: Mint
• Bracelet: Like new
• Dial: Mint
• Case back: Very good

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Work performed (Service 01/2026)

• Clockwork completely cleaned and oiled
• Regulation of the clockwork
• Professional cleaning and final inspection
• High-gloss polish of the case
• professionally refurbished case
• Bezel finished with a high-gloss coating
• New leather strap fitted
• New acrylic glass used

The watch is technically flawless and ready to wear.

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Technical data

Brand: Omega
Model: Seamaster Automatic Gold Mint+
Reference: 166.0204
Year of manufacture: 1978

Diameter: 34 mm
Weight: 40 g
Case material: Gold-plated (20 microns)

Dial color: Gold
Original glass: Yes
Glass: Acrylic glass

Water resistance: No guarantee / not tested

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clockwork

Inside beats the Omega Calibre 1010, a reliable automatic movement from the late 1970s. After its service in January 2026, the movement is showing excellent measurements.

Caliber: Omega 1010
Movement type: Automatic
Power reserve according to the manufacturer: approx. 42 hours

Rate values:

• Deviation: 0 seconds/day
• Amplitude: 287°
• Beat Error: 0.2 ms

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Scope of delivery

• Omega Seamaster Automatic Gold Ref. 166.0204
• Transport box
• In-house certificate of authenticity

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Conclusion

The Omega Seamaster Automatic Gold Ref. 166.0204 is a rare opportunity to acquire a near-perfect vintage Seamaster in mint+ condition. Thanks to a recent service, original Omega crystal, and excellent timekeeping, it is an outstanding choice for both collectors and enthusiasts of elegant vintage watches.