Hi, thanks for letting me join.
I acquired this coin last year as a Regal Halfpenny but I believe it to a contemporary counterfeit of a George III Halfpenny 1773.
Welcome to Numista. Please provide better photos of both obverse and reverse, preferably on a white background, as well as weight and diameter if possible so that members will be better able to answer your question.
I am no expert but everything seems to be wrong with your example. Contemporary fake? I have no clue but it looks like a very poor fake to me. Lets see what our British experts say.