Seiko Cal. 5639 - 978

The Seiko 5639-978 represents an important milestone in Seiko's 1970 lineup. With its 19mm lug width and 8.0mm profile, it sits comfortably on most wrists. [seikata-wm-83dfe9199ef3]

Also known as: Samurai

Specifications

Movement

Solar

Case Material

Titanium

Case Width

35mm

Case Thickness

8.0mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

120m

Dial Color

White

Jewels

20j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1970

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