No it's a gold and silver coin tester. Very cool. You put in a coin silver or gold that you know is real. Set it to 0 then put in the coin in question. The. It let you know if the composite is the same
Oh a coin comparator of sorts. I got one cheap, fleabay. IIRC I think it can be set to accept or reject whatever coin you put in the slot. Good luck in your quest.