Seiko Cal. 6631 - 508

This Spring Drive model from 1981 features a 37mm Titanium case. It features a Cream dial protected by a Hardlex crystal and offers 130m of water resistance. [seikata-wm-15e3b4e07400]

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

37mm

Case Thickness

9.8mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

130m

Dial Color

Cream

Jewels

29j

Frequency

28,800 bph

Power Reserve

65 hours

Year

1981

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