This 5 Set Unopened Envelopes1963 U. Philadelphia Mint proof coin sets is a must-have for any serious coin collector. The 5 sets includes uncirculated silver coins with a denomination of. Three of the coins. 10 are composed of 0.9 fineness silver and were struck at the United States Mint in Philadelphia. There are 25 Coins in this offer sealed in Cello and comes with the OGP These coins are of ungraded quality and come with certification from the U. The 5 sets is a prime example of the high level of craftsmanship and attention to detail that went into the production of American coins in the 1960s. This set is a valuable addition to any collection and is sure to be a conversation starter.