1968 through 1998 PROOF sets - Plus 1976 Silver Proof Set-Lot of 32 Sets-Box/COA. 1976 Bicentennial Silver Proof Set. All sets come with original government packaging as pictured. All Proof and Mint Sets Available at. This item is in the category "Coins & Paper Money\Coins: US\Proof Sets".The seller is "timer6256" and is located in this country: US. This item can be shipped to United States.