Seiko Cal. 5638 - 679

The Seiko 5638-679 represents an important milestone in Seiko's 1986 lineup. With its 21mm lug width and 15.7mm profile, it sits comfortably on most wrists. [seikata-wm-26e24cc49ee3]

Also known as: Sportsmatic

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

15.7mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Cream

Jewels

32j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1986

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