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international measurement standard

International Prototype of the Kilogram

Made by Johnson Matthey · London, United Kingdom

  1. The productInternational Prototype of the Kilograminternational measurement standard
  2. The makerJohnson MattheyLondon, United Kingdom
  3. Sales contactLiam CondonChief Executive Officer
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Physical artifact that formerly defined the kilogram unit of mass

What the maker can do

Chemical manufacturing