1929 Round-the World flight card to Lakehurst, little overall toning, fine (Cat No. Si.30Ac) (Image)

Est.$300

1930 SAF cover with "This Article made the Complete Round Trip" hs, franked with stamps of Brazil, Germany and the United States, with appropriate postmarks and signatures of the crew members, fine-v.f., rare cover (Image)

Est.$3,000

1930 Switzerland flight card, mixed franking with Swiss adhesives, cancelled Bern in red, v.f. (Image)

Est.$500

1931 cover flown on both the 3rd SAF and East Sea Flight, Lubeck and Friedrichshafen departure pmks, Buenos Aires and Villeneuve (France) arrival strikes, fine-v.f. and extremely rare double flight (Image)

Est.$500

1931 Polar Flight cover franked with 4m (cancelled on board), transferred to Icebreaker Malyguin, with Moscow arrival postmark (rare), v.f. (Mi.458) cat. €1100 (Cat No. C42) (Image)

Cat. €1100, Est.$500

1937 Hindenburg, Paquebot-Post, cover franked with 75pf green, cancelled New York May 10 Paquebot, addressed to Holland, with red "Mit dem Luftschiff Hindenburg Nach Nord-Amerika" return address, enclosure from the "Staatsbedurf der P.T.T. in Rotterdam" confirming that this letter will travel on the "Hindenburg", cover with filing fold away from the stamp, v.f. and rare (Cat No. Si.454Ch) (Image)

Est.$5,000