Seiko Cal. 5637 - 441

This Spring Drive model from 1993 features a 44mm Stainless Steel case. Powered by the 5637 caliber with 33j jewels beating at 36,000 bph, it delivers a 39 hours power reserve. [seikata-wm-6de9f3971bd4]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

11.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

33j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1993

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