Seiko Cal. 6635 - 106

The Seiko 6635-106 represents an important milestone in Seiko's 1971 lineup. Powered by the 6635 caliber with 20j jewels beating at 28,800 bph, it delivers a 37 hours power reserve. [seikata-wm-4df1078ad999]

Also known as: Bullhead, Helmet

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

10.1mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Burgundy

Jewels

20j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1971

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