Seiko Cal. 5637 - 441

Seiko 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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