United States Stamp Society
The United States Stamp Society (USSS) is the largest philatelic organization dedicated to the research and study of United States postage and revenue stamps. The Society is a non-profit collector-based organization with a world-wide membership of over 1700. The USSS is Affiliate #150 the American Philatelic Society (APS). Since 1930 the Society has encouraged philatelic study through voluntary membership in specialized committees. Some committees specialize in specific stamp issues like the Washington-Franklin heads, the Prexie or the Liberty Series, while other committees study specialized areas of U.S. philately such as Plate Numbers and Marginal Markings, Private Vending and Affixing Perforations, Booklets and Panes, and Luminescence. Research is made available through published books, research papers and articles in the monthly journal, The United States Specialist.