1931, first overseas flight, airmail letter from the USA, with 5 C. Airmail per \"American legion Convention cross-country Flight\" and appropriate Cachet from \"BOSTON, MASS. OCT 10\" (1930) to Germany transported, there with 1, 2 and 3 M. Airmail franked and from \"FRIEDRICHSHAFEN 13.11.30\" to Boston / USA return transportation with arrival postmark Rio de Janeiro from 22. VI. 31 and all corresponding Cachets, extraordinary and attractive document in good condition