Seiko Cal. 6638 - 580

The Seiko 6638-580 represents an important milestone in Seiko's 1973 lineup. Powered by the 6638 caliber with 18j jewels beating at 21,600 bph, it delivers a 71 hours power reserve. [seikata-wm-7b401e39e9cc]

Also known as: Rally, Emperor

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

10.1mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

160m

Dial Color

White

Jewels

18j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1973

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