Seiko Cal. 6656 - 390

The Seiko 6656-390 represents an important milestone in Seiko's 1967 lineup. Powered by the 6656 caliber with 29j jewels beating at 21,600 bph, it delivers a 69 hours power reserve. [seikata-wm-f79a995b83f4]

Also known as: Sumo

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

38mm

Case Thickness

8.1mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

White

Jewels

29j

Frequency

21,600 bph

Power Reserve

69 hours

Year

1967

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