Seiko Cal. 5660 - 857

The 5660-857 is a sought-after Solar piece from Seiko's golden era. Powered by the 5660 caliber with 29j jewels beating at 28,800 bph, it delivers a 72 hours power reserve. [seikata-wm-d1023f2e6d8e]

Also known as: Helmet, Crown

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

10.9mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

30m

Dial Color

Green

Jewels

29j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1979

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