First Flight Cover tied by Scott #C38 (w/Overprint: 1.Südamerika Fahrt w/Eagle) - Friedrichshafen, Germany to Buenos Aires, Argentina via Rio de Janeiro 5/18/1930 on Post Card w/ Sepia Photograph of C.B. Michael by von Eckert, Pflug & Leipzig - Luftschiff Graf Zeppelin Südamerika Fahrt 1930 Red Rubber Stamp Cachet & Rio de Janeiro 5/25/1930 Purple Rubber Stamp Cachet