cover Zeppelin Flights, 1930-36, thirteen cacheted Zeppelin covers, incl. Germany with 4m Polar flight, 4m South America flight, Liechtenstein, Luxembourg in combination with Germany, U.S. no. C18 autographed by Hugo Eckener, also a German glider flight and a French cover, some slight soiling or overall toning, still a fine lot, Sieger DM5,430est.