Seiko Cal. 5631 - 559

Seiko 5631-559

The 5631-559 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 5631 caliber with 26j jewels beating at 21,600 bph, it delivers a 39 hours power reserve. [seikata-wm-30bf4ab77d24]

Also known as: Sumo

Specifications

Movement
Kinetic
Case Material
PVD Black
Case Width
40mm
Case Thickness
8.9mm
Lug Width
21mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
160m
Dial Color
White
Jewels
26j
Frequency
21,600 bph
Power Reserve
39 hours
Year
1965

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