Zeppelin Flight. 1929 (April 23-25), Mediterranean Sea Flight two postcards to Chicago, each one franked by Eagle 1m, both cancelled on-board with ''22.4.1929'' ds, red flight marking, first one dropped at Seville, the other one at San Remo, both on April 25, Chicago arrivals on May 8, mostly VF, Sieger #24 var, Seville drop is not listed, Frost #127-19D, H, C.v. $650 (Image)

Zeppelin Flight. 1929 (October 2), 4th Switzerland Flight pre-printed postcard (view of Hamburg), franked by two Eagle Air Post values, ''2.10.1929'' on-board cancellation, Bern the same day arrival marking, VF, Sieger #39c, €330 (Image)

Zeppelin Flight. 1932 (April 4-13), two postcards of the 2nd SA Direct and Return Flights with German and Brazilian franking, first one bearing two German stamps, green Flight cachet and Recife (Pernambuco) ''7.IV.32'' arrival ds; the other one - franked by three Brazilian values, black confirmation cachet and Friedrichshafen ''13.4.32'' receiver, mostly VF, Sieger #143, Est. $200-$250 (Image)

Zeppelin Flight. 1932 (August 29 - September 1), 5th SAF postcard (Hugo Eckener) to Bolivia, franked by three air post stamps, tied by ''30.8.32'' on board marking, violet confirmation cachet and La Paz ''14.SEPT.32'' arrival ds, mounted on page from a Collection, VF, Sieger #171, Est. $150-$200 (Image)

Zeppelin Flights. 1924 (October 12-15), Airship Z.R.3 America Flight, 6 postal history items, postcard and cover originated from Friedrichshafen and 4 items from Augsburg, Charlottenburg, Halle and Stuttgart, appropriate franking and violet oval confirmation cachet, F/VF, Sieger #20a, b, Est. $300-$400 (Image)