Seiko Cal. 6635 - 880

The Seiko 6635-880 represents an important milestone in Seiko's 1974 lineup. The Fixed bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-675de04f4a2b]

Also known as: UFO, Emperor

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

10.4mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1974

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