Seiko Cal. 5637 - 904

This Hand-Winding model from 1984 features a 37mm Stainless Steel case. With its 19mm lug width and 10.5mm profile, it sits comfortably on most wrists. [seikata-wm-25956388d2bf]

Also known as: Bullhead, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

10.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Blue Sunburst

Jewels

18j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1984

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