Seiko Cal. 6688 - 957

The Seiko 6688-957 represents an important milestone in Seiko's 1976 lineup. It features a White dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-6821aa96cc5c]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

44mm

Case Thickness

13.0mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

40m

Dial Color

White

Jewels

30j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1976

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