Seiko Cal. 5663 - 381

The Seiko 5663-381 represents an important milestone in Seiko's 1971 lineup. Powered by the 5663 caliber with 17j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-a1117c69f131]

Also known as: World Timer, Sea Horse

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

12.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Burgundy

Jewels

17j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1971

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