Seiko Cal. 5639 - 731

Seiko 5639-731

The 5639-731 is a sought-after Kinetic piece from Seiko's golden era. The Fixed bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-a69d2e11bf02]

Also known as: Pogue, Rally

Specifications

Movement
Kinetic
Case Material
Hardlex-Coated Steel
Case Width
34mm
Case Thickness
9.0mm
Lug Width
22mm
Crystal
Acrylic
Bezel
Fixed
Water Resistance
110m
Dial Color
Green
Jewels
26j
Frequency
36,000 bph
Power Reserve
64 hours
Year
1981

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