Seiko Cal. 5643 - 109

The Seiko 5643-109 represents an important milestone in Seiko's 1979 lineup. Powered by the 5643 caliber with 20j jewels beating at 28,800 bph, it delivers a 40 hours power reserve. [seikata-wm-0b582598c0dc]

Also known as: Helmet, Silverwave

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

14.6mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

200m

Dial Color

Green

Jewels

20j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1979

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