Seiko Cal. 5640 - 959

The Seiko 5640-959 represents an important milestone in Seiko's 1977 lineup. With its 18mm lug width and 14.9mm profile, it sits comfortably on most wrists. [seikata-wm-eb1e23e64f27]

Also known as: Sea Horse

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

14.9mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

90m

Dial Color

Navy

Jewels

34j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1977

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