Seiko Cal. 5631 - 440

This Quartz model from 1979 features a 41mm Stainless Steel case. With its 21mm lug width and 13.6mm profile, it sits comfortably on most wrists. [seikata-wm-9c2042742d2c]

Also known as: Sumo, Goldfeather

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

13.6mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

120m

Dial Color

Black

Jewels

19j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1979

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