Seiko Cal. 5643 - 980

The Seiko 5643-980 represents an important milestone in Seiko's 1977 lineup. With its 20mm lug width and 14.3mm profile, it sits comfortably on most wrists. [seikata-wm-5422f5e38453]

Also known as: Turtle, Emperor

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

40mm

Case Thickness

14.3mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

140m

Dial Color

Green

Jewels

25j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1977

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