Seiko Cal. 6635 - 908

The Seiko 6635-908 represents an important milestone in Seiko's 1991 lineup. Powered by the 6635 caliber with 30j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-92e26fb8a6bd]

Also known as: Helmet, Emperor

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

10.5mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Champagne

Jewels

30j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1991

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