1957 United States Mint 5 Coin Proof Set OGP & COA SILVER 90% SEALED & COMPLETE! DO NOT MISS THIS DEAL!! LISTED IN US MINT CONDITION! ALL ITEMS LISTED TO THE BEST OF OUR KNOWLEDGE. (1) 1957 United States Mint 5 Coin Proof Set OGP & COA SILVER 90% SEALED & COMPLETE! (Camera props not included).