Seiko Cal. 6637 - 456

This Spring Drive model from 1974 features a 37mm Stainless Steel case. Powered by the 6637 caliber with 17j jewels beating at 36,000 bph, it delivers a 45 hours power reserve. [seikata-wm-e5ff769cec7e]

Also known as: Arnie

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

14.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

150m

Dial Color

Cream

Jewels

17j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1974

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