Seiko Cal. 6637 - 668

Seiko 6637-668

The 6637-668 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6637 caliber with 34j jewels beating at 28,800 bph, it delivers a 47 hours power reserve. [seikata-wm-4d0a5eb30e89]

Also known as: Turtle, Flighty

Specifications

Movement
Hand-Winding
Case Material
Titanium
Case Width
34mm
Case Thickness
14.4mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
90m
Dial Color
Silver
Jewels
34j
Frequency
28,800 bph
Power Reserve
47 hours
Year
1979

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