Seiko Cal. 3866 - 163

This Spring Drive model from 1970 features a 44mm Two-Tone case. With its 18mm lug width and 14.4mm profile, it sits comfortably on most wrists. [seikata-wm-3eb0c2529692]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

44mm

Case Thickness

14.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

110m

Dial Color

Black

Jewels

29j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1970

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