Seiko Cal. 5645 - 399

This Solar model from 1970 features a 43mm PVD Black case. With its 22mm lug width and 12.6mm profile, it sits comfortably on most wrists. [seikata-wm-1fb929d841fc]

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

43mm

Case Thickness

12.6mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Green

Jewels

31j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1970

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