Seiko Cal. 5631 - 394

This Spring Drive model from 1972 features a 35mm Two-Tone case. Powered by the 5631 caliber with 29j jewels beating at 36,000 bph, it delivers a 38 hours power reserve. [seikata-wm-cec682ae44fa]

Also known as: Shogun, Silverwave

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

35mm

Case Thickness

12.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

80m

Dial Color

Silver

Jewels

29j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1972

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