Seiko Cal. 5639 - 831

Seiko 5639-831

The Seiko 5639-831 represents an important milestone in Seiko's 1975 lineup. Powered by the 5639 caliber with 28j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-a5ed237b3806]

Also known as: Silverwave, Sea Horse

Specifications

Movement
Quartz
Case Material
Titanium
Case Width
41mm
Case Thickness
10.1mm
Lug Width
21mm
Crystal
Hardlex
Bezel
Rotating
Water Resistance
160m
Dial Color
Silver
Jewels
28j
Frequency
21,600 bph
Power Reserve
55 hours
Year
1975

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seikata-wm-a5ed237b3806