Seiko Cal. 6656 - 831

Seiko 6656-831

The 6656-831 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6656 caliber with 29j jewels beating at 21,600 bph, it delivers a 40 hours power reserve. [seikata-wm-f045dff1260c]

Also known as: Baby Tuna, Emperor

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
43mm
Case Thickness
9.8mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Rotating
Water Resistance
160m
Dial Color
Cream
Jewels
29j
Frequency
21,600 bph
Power Reserve
40 hours
Year
1974

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