This 1957 U.S. Proof Set Flat Pack Coin Set is a must-have for any collector. The set includes coins made of 0.9 fineness silver, struck in Philadelphia and certified by the U.S. Mint. The set is ungraded and features a proof strike type. This is a great addition to any collection and comes with a denomination of a Proof Set.the .01 and .05 are copper while the .50, ..25, .10 are silver 90%