Seiko Cal. 5631 - 928

This Kinetic model from 1975 features a 39mm PVD Black case. Powered by the 5631 caliber with 19j jewels beating at 28,800 bph, it delivers a 46 hours power reserve. [seikata-wm-136dfc6fa670]

Also known as: Goldfeather, Navigator

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

39mm

Case Thickness

11.3mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Black

Jewels

19j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1975

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