All Proof and Mint Sets Available at. The item "1968 through 1998 CLAD PROOF sets Plus 1992 through 1998 SILVER PROOF SETS" is in sale since Friday, March 27, 2015. This item is in the category "Coins & Paper Money\Coins\ US\Proof Sets". The seller is "timer6256" and is located in Prospect, Kentucky. This item can be shipped to United States.