Seiko Cal. 5631 - 572

This Spring Drive model from 1976 features a 42mm Hardlex-Coated Steel case. It features a Burgundy dial protected by a Acrylic crystal and offers 110m of water resistance. [seikata-wm-2a454270ad0b]

Also known as: Turtle, Shogun

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

13.5mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

110m

Dial Color

Burgundy

Jewels

35j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1976

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