Seiko Cal. 5639 - 764

This Spring Drive model from 1982 features a 34mm Titanium case. With its 21mm lug width and 15.0mm profile, it sits comfortably on most wrists. [seikata-wm-a75ead00eb80]

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

34mm

Case Thickness

15.0mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Champagne

Jewels

31j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1982

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