Seiko Cal. 6641 - 758

Seiko 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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