Seiko Cal. 5631 - 566

The Seiko 5631-566 represents an important milestone in Seiko's 1981 lineup. It features a Silver dial protected by a Hardlex crystal and offers 130m of water resistance. [seikata-wm-aa7a4133bf4a]

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

36mm

Case Thickness

14.1mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

130m

Dial Color

Silver

Jewels

18j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1981

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