The 2019 American Innovation Reverse Proof Set Bundle from the San Francisco Mint. You will receive all four reverse proof sets for 2019 complete as issued by the U.S. Mint. A reverse proof coin featuring an inverted proof finish. The background is frosted, while all design elements are polished to the same mirror like finish. Each of these coins are in GEM Proof condition, and come complete with the certificate of authenticity and outer box. A very low mintage collectible with just 75,000 made.