Seiko Cal. 5663 - 731

The Seiko 5663-731 represents an important milestone in Seiko's 1981 lineup. Powered by the 5663 caliber with 28j jewels beating at 28,800 bph, it delivers a 68 hours power reserve. [seikata-wm-5604063bf1b8]

Also known as: Rally, Sea Horse

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

10.3mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Champagne

Jewels

28j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1981

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