Seiko Cal. 5631 - 674

This Solar model from 1965 features a 37mm PVD Black case. Powered by the 5631 caliber with 29j jewels beating at 21,600 bph, it delivers a 52 hours power reserve. [seikata-wm-c476af088cf7]

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

37mm

Case Thickness

15.0mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

160m

Dial Color

Black

Jewels

29j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1965

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