Seiko Cal. 5631 - 955

This Spring Drive model from 1979 features a 41mm Titanium case. With its 18mm lug width and 10.4mm profile, it sits comfortably on most wrists. [seikata-wm-30b076c8d69a]

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

41mm

Case Thickness

10.4mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1979

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