Seiko Cal. 6647 - 879

This Spring Drive model from 1971 features a 37mm PVD Black case. The Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-41c4ae22b376]

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

11.6mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

150m

Dial Color

Black

Jewels

29j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1971

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