One thin coin, looks like a ridge around the edge. Has a dime reverse and a Memorial cent reverse. I got this from an estate sale that had bags of coins. My question is? Is it real or did someone grind down 2 coins and stick them together? It is paper thin and weighs 1.53 or so grams. It sits perfectly flat and contrary to my penny close up it is silky smooth all the way around. It does not look grinded, but that's why I'm here. I don't know anything about coins, I'm new to all this. Thanks for any help in advance. It flips like a american coin.