Seiko Cal. 5639 - 831

This Hand-Winding model from 1972 features a 45mm Stainless Steel case. The Rotating bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-6c9055218a79]

Also known as: Helmet, Crown

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

14.1mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

70m

Dial Color

Cream

Jewels

23j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1972

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