Seiko Cal. 6638 - 580

Seiko 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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