1978 35mm Omega Seamaster Automatic Day-Date ref.166.0215 cal.1020 Silver Dial Watch Only

Condition: Lightly used

1978 35mm Omega Seamaster Automatic Day-Date ref.166.0215 cal.1020 Silver Dial Watch Only

Introduced during Omega’s transitional period of the late 1970s, this Seamaster represents the brand’s shift toward integrated steel case designs while retaining traditional mechanical watchmaking.
As quartz technology reshaped the industry, Omega continued refining its automatic calibres, with the cal.1020 offering a high-beat, slim-profile movement paired with practical day-date functionality.The cushion-shaped case reflects the era’s evolving aesthetics, blending sport and dress sensibilities in a form that feels distinctly period-correct.
Often overlooked, this Seamaster stands as a wearable reminder of Omega’s quiet resilience during one of Swiss watchmaking’s most challenging decades.

Condition is 7.5/10. Good condition for its age. Honest wear showing. Watch only. Max wrist size 16.5cm. Serviced in house jan2026. Running at +21sec/day @ 28800bph.

Please study the photos carefully as they represent the condition of the watch.

Watch specifications
Glass: acrylic 9/10 (has logo)
Case: 8/10
Hands: 7/10
Dial: 7/10
Bracelet: 7/10 (max wrist size 16.5cm)
WR: not waterproof
Box: ❌
Cert: ❌

Watch dimension:
Width w/o crown 35mm
Lug to lug 43.5mm
Thickness 10.5mm
Strap 22.5mm (11mm opening)

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