Seiko Cal. 6635 - 612

The Seiko 6635-612 represents an important milestone in Seiko's 1981 lineup. Powered by the 6635 caliber with 17j jewels beating at 21,600 bph, it delivers a 64 hours power reserve. [seikata-wm-8caf62feb29b]

Also known as: Samurai, UFO

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

15.9mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

90m

Dial Color

Black

Jewels

17j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1981

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