Seiko Cal. 5639 - 603

The Seiko 5639-603 represents an important milestone in Seiko's 1979 lineup. With its 18mm lug width and 9.8mm profile, it sits comfortably on most wrists. [seikata-wm-9070422e45c6]

Also known as: World Timer

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

39mm

Case Thickness

9.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Black

Jewels

28j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1979

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