Sieger 241C, 1933 Century of Progress Flight, Friedrichshafen to Miami leg, Adam Bert envelope with C18 pair tied by New York Oct 2 date of issue machine cancel, usual German and US flight cachets, backstamped Miami Oct 23, Very Fine and choice (Image)

CV. 150

Sieger 241E, 1933 Century of Progress Flight, Friedrichshafen to Chicago leg, airmail envelope franked with C18 single and vertical pair, tied by New York Oct 2 1933 date of issue machine cancel, usual German and US flight cachets, backstamped Chicago Oct 26, C18 single with perf fault, o/w Very Fine (Image)

CV. 220

Sieger 64 F, 1930 South America Flight, C13 tied on UX27 by Varick St Sta NY May 28 1930 duplex, Friedrichshafen 6.6.30 cds, usual flight cachets, small bust-photo of Dr Eckener affixed at left and signed "Eckener" at lower left, Very Fine (Image)

CV. 75

US and GERMANY Zeppelin Covers Group, US (4) and German (6) 1929/37 flights highlighted by US C13 on 1930 South America Flight postal card addressed to Paris and Germany C32 on 1930 South America Flight airmail post card, usual mixed condition, Fine group. (Image)

CV. 150