Seiko Cal. 6643 - 532

This Spring Drive model from 1970 features a 44mm PVD Black case. With its 22mm lug width and 10.3mm profile, it sits comfortably on most wrists. [seikata-wm-a32c48e5449c]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

44mm

Case Thickness

10.3mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Black

Jewels

18j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1970

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