The PCS Stamps U.S. First Day Covers set includes 52 covers from the 1970s, each featuring a different design celebrating a significant event or anniversary in the United States. They are mounted on a display page containing associated information.  Perfect for collectors interested in American history and philately, these First Day Covers highlight important moments and milestones in the country's past.  I will combine shipping for multiple purchases.  Additional covers will be listed in the coming weeks.