Seiko Cal. 5639 - 438

The Seiko 5639-438 represents an important milestone in Seiko's 1980 lineup. With its 20mm lug width and 15.4mm profile, it sits comfortably on most wrists. [seikata-wm-88936d9c2ff1]

Also known as: Rally

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

15.4mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Cream

Jewels

26j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1980

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