1972 United States Mint Set in Original Government Packaging, 13 Coins Inside!. Original packaging: The coins in the 1972-PDS Mint Set were sealed in two pliofilm flat packs: the D-Mint coins were placed together in one of the packs, and the P- and S-Mint coins were placed together in another. A disk identifying the Denver Mint was included along with the D-Mint coins. The pack containing the D-Mint coins was edged in red; the pack containing the P- and S-Mint coins was edged in blue. The two pliofilm packs and two pieces of thin cardboard (for protection) were sealed in an officially inscribed, white mailing envelope.