Seiko Cal. 6639 - 936

This Spring Drive model from 1975 features a 41mm Stainless Steel case. Powered by the 6639 caliber with 20j jewels beating at 28,800 bph, it delivers a 66 hours power reserve. [seikata-wm-70120a618774]

Also known as: Samurai

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

12.3mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

180m

Dial Color

Burgundy

Jewels

20j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1975

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