Seiko Cal. 6231 - 967

This Spring Drive model from 1967 features a 39mm Hardlex-Coated Steel case. It features a White dial protected by a Acrylic crystal and offers 150m of water resistance. [seikata-wm-5bd5d2998832]

Also known as: World Timer, Navigator

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

13.8mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

150m

Dial Color

White

Jewels

33j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1967

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