Seiko Cal. 5631 - 627

This Hand-Winding model from 1979 features a 37mm Stainless Steel case. It features a Green dial protected by a Mineral crystal and offers 30m of water resistance. [seikata-wm-79d58ff04c16]

Also known as: Sea Horse, Emperor

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

13.9mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

30m

Dial Color

Green

Jewels

36j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1979

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