Seiko Cal. 6636 - 920

This Automatic model from 1971 features a 39mm PVD Black case. With its 20mm lug width and 15.2mm profile, it sits comfortably on most wrists. [seikata-wm-27a0e352ee3c]

Also known as: Rally, Sea Horse

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

39mm

Case Thickness

15.2mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Cream

Jewels

17j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1971

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