The Minkus United States Postal Stationery 1981 Supplement #2 is a publication with 3 ring pages that provides information and illustrations of various types of United States postal stationery. This supplement focuses on the year 1981, offering collectors and enthusiasts detailed information on different postal stationery items issued during that time. The Minkus brand is known for producing high-quality philatelic publications, making this supplement a valuable resource for those interested in American postal history.