Seiko Cal. 6631 - 299

This Spring Drive model from 1981 features a 37mm PVD Black case. It features a Silver dial protected by a Hardlex crystal and offers 100m of water resistance. [seikata-wm-7c44c12e79f6]

Also known as: Shogun, Sea Horse

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

14.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

100m

Dial Color

Silver

Jewels

29j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1981

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