Seiko Cal. 6331 - 677

The Seiko 6331-677 represents an important milestone in Seiko's 1972 lineup. It features a Cream dial protected by a Hardlex crystal and offers 170m of water resistance. [seikata-wm-c90214a4d9c2]

Also known as: Shogun, Bullhead

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

37mm

Case Thickness

12.0mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

170m

Dial Color

Cream

Jewels

27j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1972

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