This 1957 U.S. Mint Proof Set in Capital Holder is a rare find for any coin collector. The set includes uncirculated coins in denominations of .50, .25, .10 are made of 0.9 fineness silver while the Jefferson and Lincoln are copper. The coins were struck at the Philadelphia Mint in a proof strike type. In addition, this set comes with a U.S. Mint certification, although it is ungraded. The Country/Region of Manufacture is the United States. This set is perfect for those looking to add a unique and valuable piece to their collection.