There is a claim I occasionally read that the origin of the word "gauge" refers to a track gauge used in railroad tracks (the distance between two rails). It's a claim I have seen here, here, on this wikipedia article, as well as on various answers regarding the etymology of the word. Some papers also note specifically that this is not the original meaning of the word.
As far as I can tell, none of the original Weyl papers mention that idea, using Eichung (or earlier on, Maßstab) in the original German, which does not have the specific meaning of a track gauge. His 1929 paper on gravitation and the electron in English translates it as gauge, but again no specific mention of this analogy. As far as I can tell, while track gauge is a possible meaning of the word, it is by no mean the only one.
Despite that, I still see the occasional claim that this is the origin of the word. Is there an origin to that idea?