Seiko Cal. 7031 - 831

This Spring Drive model from 1978 features a 46mm PVD Black case. The Fixed bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-08dea80b17ef]

Also known as: Sea Horse

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

46mm

Case Thickness

8.6mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

160m

Dial Color

Navy

Jewels

20j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1978

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