Seiko Cal. 5644 - 665

This Solar model from 1979 features a 41mm PVD Black case. With its 18mm lug width and 15.8mm profile, it sits comfortably on most wrists. [seikata-wm-5d08c18d2d09]

Also known as: Bullhead

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

41mm

Case Thickness

15.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

150m

Dial Color

Black

Jewels

31j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1979

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