Seiko Cal. 6647 - 785

Seiko 6647-785

The 6647-785 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6647 caliber with 21j jewels beating at 28,800 bph, it delivers a 40 hours power reserve. [seikata-wm-283a204651ba]

Also known as: Monster

Specifications

Movement
Spring Drive
Case Material
Gold-Plated
Case Width
42mm
Case Thickness
8.2mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
90m
Dial Color
Black
Jewels
21j
Frequency
28,800 bph
Power Reserve
40 hours
Year
1981

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seikata-wm-283a204651ba