Seiko Cal. 6331 - 850

This Spring Drive model from 1966 features a 39mm Stainless Steel case. The Fixed bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-2a7584bdbbd4]

Also known as: Goldfeather

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

11.6mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

30m

Dial Color

Black

Jewels

28j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1966

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