...yup..a few years (well, several now i reckon) i bought two 'repros'(outright fakes) of Otho and a Marc Antony denarii as the real deal..it happens to the best
Looks like Constans. Reverse is VICTORIAE AVGG DD Q NN, with two victories facing. These are a literal dime a dozen, so really no reason to fake these at all. Even in HIGH grade these only cost a few bucks. Here's one of my highest grade examples, and it still cost less than $15.