1960 1961 1962 1963 1964 Proof Set Silver Flat Pack U. Mint 5 Silver Sets # 18. 1963 set is sealed, may not be orginal, I left as is. Dime quarter and half dollar are Silver Proof. All Franclin Silver proof Half are getting rare. Only Kennedy Silver Proof 90% Silver coin in 1964 Proof Sets. Hard to find silver Flat pack. Most were Melted in 1980’s.