Seiko Cal. 3868 - 687

This Spring Drive model from 1979 features a 43mm PVD Black case. With its 19mm lug width and 10.5mm profile, it sits comfortably on most wrists. [seikata-wm-1f50a3fef472]

Also known as: Sumo, Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

43mm

Case Thickness

10.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Black

Jewels

34j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1979

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