Seiko Cal. 6636 - 771

This Hand-Winding model from 1966 features a 46mm PVD Black case. With its 22mm lug width and 8.4mm profile, it sits comfortably on most wrists. [seikata-wm-eb382d6628d3]

Also known as: Helmet, Arnie

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

46mm

Case Thickness

8.4mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Green

Jewels

32j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1966

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