Seiko Cal. 3861 - 856

This Spring Drive model from 1979 features a 35mm Hardlex-Coated Steel case. With its 19mm lug width and 11.5mm profile, it sits comfortably on most wrists. [seikata-wm-41e846494c1b]

Also known as: Sumo, Flighty

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

11.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

160m

Dial Color

Silver

Jewels

32j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1979

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