1927, Syndicate Condor, 500r-10,000r, complete set of seven, full OG, NH, VF, Est. $75-$100 (Image)

Zeppelin Flights. 1930 (May 25-June 6), 1st Europe - Pan America Flight cover from Rio to Friedrichshafen, franked by three values, including two Zeppelin stamps, violet confirmation marking and Condor label is on reverse, Friedrichshafen machine ''6.6.30'' drop, returned to US by ship with green special Zeppelin ''Jun.18.30'' ds, mostly VF, Est. $150-$200 (Image)

Zeppelin Flights. 1931 (September 4-7), First South America Return Flight postcard, franked by four stamps, including Zeppelin surcharges complete set of two, Pernambuco ''3.IX.31'' date stamp, violet confirmation cachet and Friedrichshafen ''7.9.31'' arrival marking, VF, Sieger #125C, Est. $100-$150 (Image)