Seiko Cal. 6637 - 577

This Spring Drive model from 1997 features a 41mm Stainless Steel case. Powered by the 6637 caliber with 27j jewels beating at 28,800 bph, it delivers a 66 hours power reserve. [seikata-wm-e13d12178f7c]

Also known as: Shogun, Bullhead

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

15.0mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

40m

Dial Color

Champagne

Jewels

27j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1997

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