The American Numismatic Association has devised a system to give a more precise classification of the coins. This system essentially uses abbreviations with numbers to help dealers in buying and selling of their coins. Proof-70 Perfect proof Proof-67 Gem proof Proof-65 Choice proof Proof-63 Select proof Proof-60 Proof Uncirculated coins are graded by mint state (MS) MS -70 Perfect MS -67 Gem MS -65 Choice MS -63 Select MS -60 Uncirculated