Yugoslavia, Airmail

,,Zeppelin. Argentina Return Flight cover, creased and stamps with slight faults. Franked with 1,15, sent from Buenos Aires (30? JUN 34) via Friedrichshafen (6.7.34) and Zemun (7.VII.34) to Vel. Bečkerek (Zrenjanin, 8.VII.34). Mi. 375 A'