Seiko Cal. 3861 - 687

This Hand-Winding model from 1978 features a 41mm Titanium case. With its 19mm lug width and 14.1mm profile, it sits comfortably on most wrists. [seikata-wm-9a59566f377d]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

41mm

Case Thickness

14.1mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

170m

Dial Color

Blue Sunburst

Jewels

22j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1978

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