Seiko Cal. 7139 - 623

This Spring Drive model from 1981 features a 41mm Two-Tone case. With its 21mm lug width and 12.6mm profile, it sits comfortably on most wrists. [seikata-wm-509a96237e60]

Also known as: Sumo, Shogun

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

12.6mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

100m

Dial Color

Black

Jewels

18j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1981

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