Seiko Cal. 6644 - 931

This Solar model from 1978 features a 39mm Gold-Plated case. With its 19mm lug width and 8.2mm profile, it sits comfortably on most wrists. [seikata-wm-af32f5346700]

Also known as: Sumo, Bellmatic

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

8.2mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Blue Sunburst

Jewels

27j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1978

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