Seiko Cal. 5631 - 974

The Seiko 5631-974 represents an important milestone in Seiko's 1980 lineup. Powered by the 5631 caliber with 21j jewels beating at 21,600 bph, it delivers a 39 hours power reserve. [seikata-wm-4fa1fcdf303d]

Also known as: Samurai

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

42mm

Case Thickness

8.6mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Green

Jewels

21j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1980

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