Seiko Cal. 6644 - 768

This Hand-Winding model from 1971 features a 40mm PVD Black case. The Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-fcce62b3039e]

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

40mm

Case Thickness

12.8mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

30m

Dial Color

Champagne

Jewels

20j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1971

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