We get a lot of post here asking "well, how do you know it's a fake?" For some coins it's hard for me to put into words. This one, the pearls on the bottom row in front of the ear as well as the "o" in reparatio looked odd. Other than that, it's a convincing fake. While some are quite a bit easier to describe, like this one (which was never intended to deceive anyone). Wrong style, wrong size/weight, wrong metal, wrong fabric... A good comparison might be morgan dollars. To me, I can't tell the difference between the real and the fake but like with the Constans, the fake has sings that an experienced collector would spot. While the silver round is much easier to spot the differences: Wrong style, wrong size/weight, wrong metal (purity in this case), wrong fabric Real Fake Silver round Instead of going on, I think I'll leave this open ended and ask you all how do you know a coin is fake?