Seiko Cal. 5656 - 817

The Seiko 5656-817 represents an important milestone in Seiko's 1978 lineup. Powered by the 5656 caliber with 31j jewels beating at 28,800 bph, it delivers a 67 hours power reserve. [seikata-wm-a2974646adda]

Also known as: UFO

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

12.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

180m

Dial Color

Black

Jewels

31j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1978

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