This is a rare opportunity to own a piece of history. The 1957 and 1959 Silver U. Mint Proof Sets are still sealed and come with certification from the U. The sets include a variety of coins with varying denominations and finenesses, all struck in Philadelphia. These sets are a must-have for any serious coin collector, especially those interested in rare and unique pieces. Don't miss out on the chance to add these stunning collections to your own.