Seiko Cal. 5649 - 766

This Spring Drive model from 1975 features a 37mm PVD Black case. With its 21mm lug width and 13.6mm profile, it sits comfortably on most wrists. [seikata-wm-a20e4f99e622]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

13.6mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Burgundy

Jewels

17j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1975

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