Zeppelin Flights. 1930 (May 18-19), First SAF cover to Seville, franked by ''1 Südamerika Fahrt'' 2m ultra, tied by Friedrichshafen ''18.5.30'' date stamp, red confirmation cachet, machine Seville arrival on reverse, mostly VF, C.v. $375, Est. $150-$200 (Image)

Zeppelin Flights. 1930 (May 18-31), First SAF postcard to Lakehurst, franked by ''1 Südamerika Fahrt'' 4m black brown, tied by Friedrichshafen ''18.5.30'' date stamp, German and American (type I) confirmation markings, Lakehurst ''May 31, 1930'' receiver, mostly VF, C.v. $375, Est. $150- $200 (Image)

Zeppelin Flights. 1931 (July 24-27), North Pole Flight postcard, franked by ''Polar Fahrt 1931'' overprint on 2m ultra, tied by Friedrichshafen ''24.7.31'' date stamp, red confirmation marking and ice-breaker ''Malygin'' drop ''27.VII.31'', mostly VF, C.v. $325, Sieger #119F, €425, Est. $150-$200 (Image)

Zeppelin Flights. 1931 (July 25-27), North Pole Flight cover, franked by ''Polar Fahrt 1931'' overprint on 4m black brown, on board cancel ''26.7.1931'' (late date stamp, probably because the cover was posted at Leningrad), red confirmation cachet and ice-breaker ''Malygin'' special arrival marking, mostly VF, C.v. $825, Sieger #119F, €1,100, Est. $250-$300 (Image)

Zeppelin Flights. 1934 (December 8-12), 12th SAF (Christmas Flight) hard wove paper hand-painted postcard to Recife, franked by five Eagle stamps, tied by Friedrichshafen ds, green confirmation cachet, arrival marking on reverse, VF and extremely rare, Est. $200-$300 (Image)