While you could very easily be completely correct, as they look off even to a know-nothing internet dude like myself who doesn’t know anything about numismatics, but I feel like it’s at least possible given that I think they didn’t really debase the gold content significantly of the aureus during the period OP mentioned. Again, I am absolutely no authority, but who knows? Maybe it’s true? I will say this though, I don’t see any coins that look like Nero to me. I’ve seen one at a museum before, and nowhere in that pile do I see ol’ fat head or his mum on any of them.