Seiko Cal. 5640 - 943

The Seiko 5640-943 represents an important milestone in Seiko's 1986 lineup. With its 18mm lug width and 8.3mm profile, it sits comfortably on most wrists. [seikata-wm-5e14abffd1dd]

Also known as: Bullhead, Sea Horse

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

8.3mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Blue Sunburst

Jewels

27j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1986

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