Much more affordable than earlier U.S. proof sets. Now well over 50 years old it's the least costly U.S. proof set of its vintage. This was one of the last regular U.S. proof sets to include three 90% silver denominations (the dime, quarter and half dollar) in addition to the cent and nickel. Many of the sets were later broken up to obtain coveted individual Franklin silver half dollar proofs, which were issued only in these sets. Sealed U.S. Mint cellophane packaging protected the beauty of these finest-quality proofs.