Seiko Cal. 6664 - 690

Seiko 6664-690

The 6664-690 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6664 caliber with 29j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-c1cc9caa36b5]

Also known as: Bullhead, Silverwave

Specifications

Movement
Spring Drive
Case Material
Gold-Plated
Case Width
46mm
Case Thickness
9.9mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
100m
Dial Color
Champagne
Jewels
29j
Frequency
21,600 bph
Power Reserve
56 hours
Year
1965

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