Seiko Cal. 6664 - 643

Seiko 6664-643

This Spring Drive model from 1981 features a 38mm Hardlex-Coated Steel case. Powered by the 6664 caliber with 34j jewels beating at 21,600 bph, it delivers a 62 hours power reserve. [seikata-wm-2de480554f23]

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
38mm
Case Thickness
10.2mm
Lug Width
21mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
90m
Dial Color
Green
Jewels
34j
Frequency
21,600 bph
Power Reserve
62 hours
Year
1981

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