File:International Prototype of the Kilogram (IPK) maintained by the General Conference on Weights and Measures (GCPM) and the International Committee for Weights and Measures (CIPM).jpg
International_Prototype_of_the_Kilogram_(IPK)_maintained_by_the_General_Conference_on_Weights_and_Measures_(GCPM)_and_the_International_Committee_for_Weights_and_Measures_(CIPM).jpg (201 × 250 pixels, file size: 6 KB, MIME type: image/jpeg)