Seiko Cal. 6670 - 721

This Spring Drive model from 1970 features a 35mm PVD Black case. With its 19mm lug width and 11.5mm profile, it sits comfortably on most wrists. [seikata-wm-708b2dad8497]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

35mm

Case Thickness

11.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Green

Jewels

36j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1970

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