Die Polish Lines Present in Both Genuine and Counterfeit Coins
ecently, using the 1955 doubled die cent as an example, I’ve written that authenticators use Mint die polish lines to authenticate coins. I learned about die polish later. My first authentication lesson at the American Numismatic Association authentication service occurred sometime around Christmas 1972 after working there as a clerk for several months. Up until then, my main duties were to weigh and photograph the coins we received. At that time, the total
