Seiko Cal. 5631 - 580

This Solar model from 1973 features a 36mm Titanium case. The Bidirectional bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-e17c4337d95b]

Also known as: Rally

Specifications

Movement

Solar

Case Material

Titanium

Case Width

36mm

Case Thickness

14.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Navy

Jewels

20j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1973

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