Seiko Cal. 6647 - 437

Seiko 6647-437

The 6647-437 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6647 caliber with 32j jewels beating at 21,600 bph, it delivers a 52 hours power reserve. [seikata-wm-1414f7873bee]

Also known as: Monster, Goldfeather

Specifications

Movement
Spring Drive
Case Material
Stainless Steel
Case Width
40mm
Case Thickness
14.8mm
Lug Width
19mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
50m
Dial Color
White
Jewels
32j
Frequency
21,600 bph
Power Reserve
52 hours
Year
1969

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seikata-wm-1414f7873bee