Seiko Cal. 5631 - 597

The Seiko 5631-597 represents an important milestone in Seiko's 1976 lineup. Powered by the 5631 caliber with 17j jewels beating at 21,600 bph, it delivers a 49 hours power reserve. [seikata-wm-adfccc934b70]

Also known as: Tuna, Panda

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

10.7mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Cream

Jewels

17j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1976

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