This photo about the Italian supreme physicist Enrico Fermi is rather famous.
Yet nobody ever questioned, as far as I know, the wrongness of the fine structure constant written on it.
So I am asking you this: why is the fine structure constant written in a wrong way? And what is he drawing?
They have noticed, see this link.
That's the sort of near-invisible detail that we take for granted. It's only wallpaper. But Huber put a magnifying glass to it and found it was completely mixed up. Terms were all in the wrong places. It was nonsense, but only to those few who can make sense of such symbols in the first place.
The mind does that. It rewrites things. Any good policeman knows how wrong eye-witness testimony can be. Our mind replays a skeletal structure and then adds elaboration. The accuracy of our recollection depends on how rigorously we can control the material we fill in.
He has exchanged $e$ with $h/(2π)$ symbols, as they say in the link , people do such substitutions, more so with age. One should check again formulae as a matter of course.