Seiko Cal. 6635 - 464

The Seiko 6635-464 represents an important milestone in Seiko's 1991 lineup. With its 21mm lug width and 9.8mm profile, it sits comfortably on most wrists. [seikata-wm-b47537c62234]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

9.8mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

60m

Dial Color

Champagne

Jewels

17j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1991

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