The second picture on Wikipedia is of a British one [1]. And [2] have modern ones for hire, but there's no picture. But [3] seem to use a crane and weights, r

The second picture on Wikipedia is of a British one [1]. And [2] have modern ones for hire, but there's no picture. But [3] seem to use a crane and weights, rather than a truck. ("[Railroad] scale test car" is American, it should be something like "rail[way] weighbridge test truck" in British. I don't know this term in any other languages, so finding German and French ones is an exercise for someone else.) [1] https://en.wikipedia.org/wiki/Scale_test_car https://en.wikipedia.org/wiki/Scale_test_car [2] https://www.brash-scales.com/weighbridge-test-unit-hire https://www.brash-scales.com/weighbridge-test-unit-hire [3] https://www.wyjs.org.uk/calibration/testing-of-weights-and-measures-equipment/testing-of-automatic-rail-weighbridges/ https://www.wyjs.org.uk/calibration/testing-of-weights-and-m...