Roman copper coin, a rare fake featuring head of Balbinus (10)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

definition: a member of the Italian (i.e. Rome/"Roman") police force ("copper" = policeman). My Chambers has this listed as 'carabiniere', with CARABINERO as 'A member of the Spanish Civil Guard' anagram/"fake" of (coin a rare)*, around the head letter of B-[albinus] for the surface reading, Balbinus was an emperor of ancient Rome