Seiko Cal. 5639 - 426

This Spring Drive model from 1974 features a 38mm Two-Tone case. With its 21mm lug width and 14.3mm profile, it sits comfortably on most wrists. [seikata-wm-f09679c97bbb]

Also known as: Sumo, Flighty

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

38mm

Case Thickness

14.3mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

70m

Dial Color

White

Jewels

29j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1974

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