Seiko Cal. 5639 - 980

The Seiko 5639-980 represents an important milestone in Seiko's 1977 lineup. With its 19mm lug width and 11.8mm profile, it sits comfortably on most wrists. [seikata-wm-cd80f7e77e32]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

34mm

Case Thickness

11.8mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

60m

Dial Color

Navy

Jewels

19j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1977

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