Collection of stamps cards and covers illustrating the development of international air post 1870-1950

Collection of stamps cards and covers illustrating the development of international air post 1870-1950 / amassed by Miss Winifred Penn-Gaskell. 77: Airgraphs, many illustrated, 1941-1945. 42 items including: 1-17, general forms, used and unused, some stamps added, item 10 stamp preprinted; 18-24, Christmas forms, illustrated; 25-28, V-Mail [V...-MAIL] blank pictorial forms; 29-40, used Seabees and V-Mail, pre-microphotography but not destroyed, or sent by regular post; 41, article on airgraphs and microphotography by William E Hughes and 42, correspondence concerning retrieval of duplicate of airgraph film lost in post, 1943. Listed