Seiko Cal. 6647 - 755

This Spring Drive model from 1976 features a 43mm PVD Black case. With its 20mm lug width and 8.5mm profile, it sits comfortably on most wrists. [seikata-wm-22b9a2622c8a]

Also known as: Sumo, Rally

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

43mm

Case Thickness

8.5mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

40m

Dial Color

Black

Jewels

24j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1976

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