Seiko Cal. 6637 - 767

The Seiko 6637-767 represents an important milestone in Seiko's 1992 lineup. The Fixed bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-ee4ef7732d6b]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

10.0mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

50m

Dial Color

Green

Jewels

22j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1992

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