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;