Seiko Cal. 5660 - 911

Seiko 5660-911

The 5660-911 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5660 caliber with 20j jewels beating at 21,600 bph, it delivers a 65 hours power reserve. [seikata-wm-b939ff70a4b4]

Also known as: Sumo, Arnie

Specifications

Movement
Automatic
Case Material
PVD Black
Case Width
34mm
Case Thickness
12.6mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
50m
Dial Color
Champagne
Jewels
20j
Frequency
21,600 bph
Power Reserve
65 hours
Year
1967

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