Seiko Cal. 6636 - 741

This Hand-Winding model from 1977 features a 37mm PVD Black case. With its 22mm lug width and 13.1mm profile, it sits comfortably on most wrists. [seikata-wm-a74f5da11fc4]

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

37mm

Case Thickness

13.1mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

100m

Dial Color

White

Jewels

31j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1977

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