Seiko Cal. 5637 - 301

This Spring Drive model from 1983 features a 35mm PVD Black case. With its 22mm lug width and 15.6mm profile, it sits comfortably on most wrists. [seikata-wm-eaab55d63d96]

Also known as: UFO, World Timer

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

35mm

Case Thickness

15.6mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

190m

Dial Color

Black

Jewels

19j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1983

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