Seiko Cal. 4431 - 672

This Hand-Winding model from 1979 features a 45mm Stainless Steel case. The Rotating bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-0efe08dca0aa]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

12.3mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

150m

Dial Color

Black

Jewels

21j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1979

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