Seiko Cal. 4431 - 729

This Spring Drive model from 1965 features a 43mm Stainless Steel case. The Fixed bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-f982d99b92b1]

Also known as: Rally, Crown

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

9.6mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

110m

Dial Color

Champagne

Jewels

21j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1965

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