Lot no. 9872

AIRMAIL: Interesting lot with 6 titles about international airmail, with better ones like American Air Mail Society, American Air Mail Catalogue. A reference listing of the Airposts of the World, Vol. II, 1950 and Frank Muller, Catalogue des Etiquettes Aéropostales émises par les Administrations postales, les Compagnies de Navigation Aérienne, etc., 2nd ed. 1947, vakuable lot with unusual content