Seiko Cal. 6643 - 933

The 6643-933 is a sought-after Hand-Winding piece from Seiko's golden era. With its 22mm lug width and 15.6mm profile, it sits comfortably on most wrists. [seikata-wm-35064ba78656]

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

40mm

Case Thickness

15.6mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

White

Jewels

19j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1966

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