Seiko Cal. 6638 - 449

This Spring Drive model from 1981 features a 37mm Two-Tone case. With its 22mm lug width and 9.5mm profile, it sits comfortably on most wrists. [seikata-wm-a2db507b97e6]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

37mm

Case Thickness

9.5mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

120m

Dial Color

White

Jewels

36j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1981

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