Seiko Cal. 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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