The product is a lot of United States First Day Covers (FDCs) from the 1940s, 1950s, 1960s, 1970s, and 1980s. These FDCs feature stamps issued on the first day of their release and are from the United States. The covers are ungraded and uncertified, providing collectors with a unique and historical piece of philatelic history from each decade. This lot offers a glimpse into the art, technology, and culture of the United States during these time periods through the stamps issued by the U.S. Postal Service.