Seiko Cal. 6635 - 117

This Spring Drive model from 1981 features a 42mm Hardlex-Coated Steel case. With its 18mm lug width and 14.9mm profile, it sits comfortably on most wrists. [seikata-wm-5c0ad2633e54]

Also known as: Sportsmatic, Navigator

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

14.9mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Champagne

Jewels

19j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1981

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