Seiko Cal. 6657 - 976

Seiko 6657-976

The 6657-976 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6657 caliber with 36j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-30801388b118]

Also known as: Sportsmatic, Emperor

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
46mm
Case Thickness
9.5mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Rotating
Water Resistance
50m
Dial Color
Cream
Jewels
36j
Frequency
36,000 bph
Power Reserve
54 hours
Year
1981

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seikata-wm-30801388b118