Seiko Cal. 6641 - 758

This Spring Drive model from 1978 features a 39mm Gold-Plated case. Powered by the 6641 caliber with 24j jewels beating at 28,800 bph, it delivers a 45 hours power reserve. [seikata-wm-536f5ccd6cda]

Also known as: Sumo, Rally

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

8.1mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Cream

Jewels

24j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1978

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