1977 P&D Mint Set with 12 Brilliant Uncirculated US Coins & Envelope (12 Coins) The 1977 P&D Mint Set includes 12 brilliant uncirculated US coins from both the Philadelphia and Denver mints. This set features coins that have never been circulated, making them ideal for collectors looking for pristine pieces. The U.S. Mint certification adds to the authenticity and value of this set, which is a great addition to any coin collection.