Seiko Cal. 5631 - 528

This Spring Drive model from 1967 features a 42mm Stainless Steel case. The Fixed bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-543d5d39a830]

Also known as: World Timer, Flighty

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

11.7mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

60m

Dial Color

Burgundy

Jewels

35j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1967

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