Seiko Cal. 5633 - 331

This Spring Drive model from 1974 features a 37mm Gold-Plated case. The Fixed bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-66cb42ad7ded]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

11.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

40m

Dial Color

Blue Sunburst

Jewels

25j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1974

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