Seiko Cal. 6375 - 691

The Seiko 6375-691 represents an important milestone in Seiko's 1978 lineup. The Coin-Edge bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-edb7be0d6bdf]

Also known as: Sumo, Helmet

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

9.2mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

White

Jewels

31j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1978

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