Seiko Cal. 5663 - 638

The 5663-638 is a sought-after Quartz piece from Seiko's golden era. The Inner Rotating bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-a1df7bd22b83]

Also known as: Sportsmatic, World Timer

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

46mm

Case Thickness

11.1mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Champagne

Jewels

21j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1979

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