The coin is clearly a counterfeit. 14 is XIV, not X1111 :>)slaves would not have been fluent in Latin
You have no idea what the X1111 means. You just assume it was supposed to mean 14, when it might have some other meaning entirely. Read the last comment in the original article where the woman from London says she believes it could be a theatre token, with the X1111 being the theatre aisle where the patron’s seat was located. As good a possibility as any. Also, you don’t think that after many months of cleaning the coin and checking it out, they wouldn’t know if it was a counterfeit or not? This coin is real, or they wouldn’t be putting it on display at the museum.

struck for the 14th Legion.