cover Zeppelin Flights, 1924-31, selection of 29 cards or covers on pages incl. 1924 First Flight to U.S. on illustrated cover, 1925 Los Angeles flights to Bermuda and to Puerto Rico, 1929 Round-the- World flight, Germany 2m and 4m South America Flight on card or cover, two 1m Chicago Flight on separate covers, six 1930 Brazil Zeppelin flight covers (two are Condor flights), United States $1.30 Graf Zeppelin on cover, 50c Chicago Zeppelin (two), 1931 Russian Polar Flight, some commercial usages, most are fine-very fine est.