Seiko Cal. 6638 - 898

This Spring Drive model from 1973 features a 38mm Hardlex-Coated Steel case. With its 22mm lug width and 10.5mm profile, it sits comfortably on most wrists. [seikata-wm-1c66a8922abc]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

10.5mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

170m

Dial Color

White

Jewels

29j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1973

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