The 2020 P&D American Innovation Pos. A & Pos. B Maryland (MD) coins are a set of four uncirculated $1 coins featuring a copper nickel clad composition. Minted in Philadelphia and Denver, these coins are part of the United States currency collection and are sold in two dollar sets. With a business strike type and no modifications, these coins are a valuable addition to any coin collection, showcasing American innovation and craftsmanship.