Seiko Cal. 6690 - 873

This Spring Drive model from 1971 features a 43mm PVD Black case. With its 21mm lug width and 10.2mm profile, it sits comfortably on most wrists. [seikata-wm-51afe47f1ea6]

Also known as: Sumo, Bullhead

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

43mm

Case Thickness

10.2mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

90m

Dial Color

Black

Jewels

28j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1971

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