Seiko Cal. 3816 - 634

This Spring Drive model from 1981 features a 35mm Stainless Steel case. With its 18mm lug width and 12.1mm profile, it sits comfortably on most wrists. [seikata-wm-5a4aedbb3982]

Also known as: Sea Horse

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

12.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Silver

Jewels

35j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1981

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