This Presidentail Proof Coin Collection American Historical Society Proof Set is a must-have for any coin collector. With a denomination of 25C, 1 Penny, 1 nickel, and 1 dime, this set includes coins from the years 1968, 1970, 1976, and 1978, all struck in proof quality at the San Francisco mint. These coins are certified by the U.S. Mint and come in uncirculated condition. The set is a great addition to any collection and is a perfect way to celebrate American history.