Seiko Cal. 6631 - 732

The Seiko 6631-732 represents an important milestone in Seiko's 1968 lineup. It features a Cream dial protected by a Sapphire crystal and offers 100m of water resistance. [seikata-wm-3dec972c9952]

Also known as: Bellmatic

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

41mm

Case Thickness

15.7mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Cream

Jewels

27j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1968

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