Super rare card
International Prototype of the Kilogram
- Value
- 200 W
- Attack
- 842
- Defence
- 673
- Players
- 0
The International Prototype of the Kilogram (referred to by metrologists as the IPK or Le Grand K; sometimes called the ur-kilogram, or urkilogram, particularly by German-language authors writing in English:30) is an object whose mass was used to define the kilogram from 1889, when it replaced the…
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