Seiko Cal. 5637 - 143

Seiko 5637-143

The 5637-143 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 5637 caliber with 22j jewels beating at 21,600 bph, it delivers a 46 hours power reserve. [seikata-wm-e424d137932d]

Also known as: World Timer, Golden Tuna

Specifications

Movement
Kinetic
Case Material
Stainless Steel
Case Width
46mm
Case Thickness
8.7mm
Lug Width
21mm
Crystal
Hardlex
Bezel
Bidirectional
Water Resistance
110m
Dial Color
Blue Sunburst
Jewels
22j
Frequency
21,600 bph
Power Reserve
46 hours
Year
1967

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