Seiko Cal. 6631 - 629

This Hand-Winding model from 1976 features a 46mm Titanium case. It features a White dial protected by a Hardlex crystal and offers 60m of water resistance. [seikata-wm-254674e2e30a]

Also known as: Sumo, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

46mm

Case Thickness

8.2mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

White

Jewels

34j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1976

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