Seiko Cal. 6640 - 760

This Hand-Winding model from 1979 features a 42mm PVD Black case. With its 22mm lug width and 9.4mm profile, it sits comfortably on most wrists. [seikata-wm-e90be9df5c75]

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

42mm

Case Thickness

9.4mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

200m

Dial Color

Blue Sunburst

Jewels

22j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1979

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