Seiko Cal. 5643 - 645

The Seiko 5643-645 represents an important milestone in Seiko's 1966 lineup. With its 20mm lug width and 9.0mm profile, it sits comfortably on most wrists. [seikata-wm-2928bf82267f]

Also known as: Silverwave

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

37mm

Case Thickness

9.0mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

40m

Dial Color

Green

Jewels

20j

Frequency

28,800 bph

Power Reserve

65 hours

Year

1966

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