The product is a set of 1960-1961 American Credo United States stamps, specifically numbers #1139 to #1144. These 4 cent stamps are in mint never hinged quality and feature a multi-color design. Although they are not certified, they are authentic and represent a piece of United States postal history from the 1950s to 1960s. These stamps would be a valuable addition to any stamp collection, especially for those interested in modern American history and culture.