The 1957 U.S. Proof Set consists of uncirculated coins in their original sealed envelope, straight from the United States Mint in Philadelphia. These silver coins have a fineness of 0.9 and are struck in proof condition. This set is a valuable collector's item, with coins graded by the U.S. Mint and originating from the United States. With no reserve price, this set offers a rare opportunity to acquire a piece of American coinage history.