Commemorative Silver Coins, Collecting Coins, Grading Coins Commemorative Silver Coins: Serious US collectors look for commemorative proof coins graded by 1 of 3 major grading companies: PCGS, NGC or ANACS. The Sheldon scale is commonly used, with MS70 being considered almost perfection. Commemorative coins are available from all over the world. Commemorativesilvercoins.com~Site InfoWhoisTrace RouteRBL Check