Seiko Cal. 6656 - 397

The Seiko 6656-397 represents an important milestone in Seiko's 1970 lineup. Powered by the 6656 caliber with 26j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-88ede69ededa]

Also known as: Sea Horse

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

40mm

Case Thickness

8.0mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Green

Jewels

26j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1970

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