Seiko Cal. 6637 - 922

This Spring Drive model from 1993 features a 38mm Stainless Steel case. Powered by the 6637 caliber with 25j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-99352335129c]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

8.0mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Black

Jewels

25j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1993

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