Seiko Cal. 5631 - 189

This Hand-Winding model from 1984 features a 39mm Titanium case. With its 22mm lug width and 15.2mm profile, it sits comfortably on most wrists. [seikata-wm-19c367336eec]

Also known as: Bellmatic, Crown

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

39mm

Case Thickness

15.2mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

120m

Dial Color

Black

Jewels

24j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1984

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