Check the listing for details. 2018-2022 American Innovation $1 Coin Proof Set. Listed at 124.95 USD. Description The United States Mint American Innovation $1 Coin Program is a multi-year series featuring distinctive reverse (tails) designs that pay homage to America’s ingenuity and celebrate the pioneering efforts of individuals or groups from each of the 50 States, District of Columbia, and U.S. territories. One of the Nation’s greatest strengths is its entrepreneurial spirit and the remarkable innovation and discovery it unleashes. The United States Mint is proud to celebrate innovation, honor the spirit of America, and introduce the American Innovation $1 Coin Proof Set. The obverse (heads) design features a dramatic representation of the Statue of Liberty in profile with the inscriptions “IN GOD WE TRUST” and “$1.” The design also includes a privy mark of a stylized gear, representing industry and innovation. The edge-incused inscriptions are “Year,” “S” mint mark, and “E PLURIBUS UNUM.” Specifications Denomination: $1 Finish: Proof Composition: 6% Zinc, 3.5% Manganese, 2% Nickel, Balance Copper Weight: 8.100 grams Diameter: 1.043 inches (26.49 mm) Edge: Lettered Mint and Mint Mark: San Francisco – S