GERMANY 1936  May 5th, Pictured Postcard with Graf Zeppelin,  First Airmail by Hindenburg,  from Friedrichshafen to New York,  First Flight circular,  red cachet "Deutsche Luftpost,  Europa-Nordamerika,  Stamp LZ 129,  50 Pfennigs,  also air,  with Swastika,  15 Pfennigs