United States, Wyoming Airpost Collection, 1924-1960. Collection of over 300 covers, most being first flights and all relating to Wyoming cities and towns, greatest concentration from the 1920's, 1930's & 1940's, with a total of nearly 50 towns represented; most with the appropriate cachets and postmarks; condition generally F-VF or better (no photo). Estimate  $500 - 750. $0