Seiko Cal. 5663 - 427

The Seiko 5663-427 represents an important milestone in Seiko's 1971 lineup. With its 21mm lug width and 8.7mm profile, it sits comfortably on most wrists. [seikata-wm-225ea55c0165]

Also known as: Sea Horse, Emperor

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

8.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Green

Jewels

25j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1971

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