1929 GRAF ZEPPELIN GERMANY to NETHERLANDS, a 50pf uprated postal card with flight cachet, posted on board the airship on OCT13-1929 with mail dropped over Amsterdam, Frost flight #127-37Ab cat $300 US, sleeved and priced 20 years ago at $375, VF est ($150+ US) (Image)

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1929 GRAF ZEPPELIN GERMANY to KOLN, a 50pf uprated postal card with flight cachet, posted on board the airship on OCT23-1929 with mail dropped over Koln on OCT 25th, Frost flight #127-38 cat $500 US, sleeved and priced 20 years ago at $600, VF est ($150+ US) (Image)

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1929 GRAF ZEPPELIN GERMANY to USA, 4m single franking #C37 pays the USA rate from Friedrichshafen on JUL31-1929 to Lakehurst-NY arriving on AUG 5th, Frost #127-27A cat $200 US, VF est ($100+ US) (Image)

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1936 HINDENBURG USA to GERMANY, a 42¢ rate for the AUG19-1936 flight from Lakehurst-NJ to Frankfurt with AUG 22nd arrival, some corner faults neatly restored, F-VF est ($50+ US) (Image)

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