Seiko Cal. 6636 - 617

Seiko 6636-617

The 6636-617 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6636 caliber with 35j jewels beating at 21,600 bph, it delivers a 54 hours power reserve. [seikata-wm-bed8dd911d22]

Also known as: UFO, Golden Tuna

Specifications

Movement
Spring Drive
Case Material
Two-Tone
Case Width
37mm
Case Thickness
15.8mm
Lug Width
18mm
Crystal
Acrylic
Bezel
Fixed
Water Resistance
60m
Dial Color
Blue Sunburst
Jewels
35j
Frequency
21,600 bph
Power Reserve
54 hours
Year
1970

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