Vintage Omega Seamaster Cosmic Automatic DayDate 166.036 - 35mm - 1969

A vintage Omega Seamaster Cosmic produced in 1969. This example features a day-date configuration with the weekdays displayed in English. The dial has a beautiful dusted tone, creating a brilliant effect under certain light angles.

The steel case measures 35mm in width, excluding the crown, and retains its original polish, preserving the sharp and honest character of the watch. Inside runs the automatic calibre 752 movement, serviced in February 2026, currently running and functioning excellently. The watch comes on its original Omega bracelet, reference 1098.

Entirely original and in great shape, this piece would make for a beautiful and reliable daily wearer.

 Year of production: 1969

 Serial number: 28.112.640

 Model / Reference number: 166.036

 Case dimensions.

  - Width excluding crown: 35mm

  - Width including crown: 38mm

  - Lug to lug: 38,5mm

  - Thickness: 11,5mm

 Lugs width: 18mm

 Strap: The original Omega bracelet. (Ref. 1098 with nr. 526 endlinks) (Fits a 14 to 18,5cm wrist)

Total weight: 80,7g

 Country of origin: Switzerland 

 Movement: Cal. 752 Automatic

 Service information: Movement serviced in February 2026. Runs and functions excellently. (~-1s/d, ~266amp, ~0.0ms b/e)

Internal code: BTW 1392