Seiko Cal. 6635 - 397

The Seiko 6635-397 represents an important milestone in Seiko's 1967 lineup. Powered by the 6635 caliber with 21j jewels beating at 28,800 bph, it delivers a 38 hours power reserve. [seikata-wm-5cea46eead51]

Also known as: Crown

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

43mm

Case Thickness

11.7mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

150m

Dial Color

Cream

Jewels

21j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1967

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