2018 United States Mint Proof Set - 10 pc set Grades. The 2018 United States Mint Proof Set features 10 proof coins encased in two clear plastic lenses in a beautifully designed package you’ll be proud to display. The 2018 proof set is a great addition to any collection. The 2018 edition of the United States Mint Proof Set includes the following coins: The ninth annual release of five quarters in the America the Beautiful Quarters Program: Pictured Rocks National Lakeshore in Michigan Apostle Islands National Lakeshore in Wisconsin Voyageurs National Park in Minnesota Cumberland Island National Seashore in Georgia Block Island National Wildlife Refuge in Rhode Island Native American $1 Coin Kennedy half dollar Roosevelt dime Jefferson nickel Lincoln penny With sharp relief and mirror-like backgrounds, U.S. Mint proof coins have frosted, sculpted foregrounds giving them a special cameo effect. The 2018 United States Mint Proof Set is a must-have for any coin collection.