1. South America flight 1931, stage to Rio, card from Hamburg 28.8. To Curitiba with 100 Pfg meter cancellation MOPHILA and 1 RM Zeppelin in part-cash-postage, transit Berlin 29.8, further with connection flight to Friedrichshafen, both flight stamp and arrival Rio 3.9. On face, unusual and at that moment not yet admitted use of a meter cancel