Zeppelin Flights. 1930 (May 18-31), South America Flight, two postcards and two covers, franked by 3 or 5 stamps of the Pilot and Crane issue, two are bearing scarce 3s red brown stamps, all with red confirmation cachet, two with Seville drop (machine or handstamp - May 19), others with Pernambuco (May 23) or Lakehurst (May 31) arrival, VF, mounted on pages from a Collection, Sieger #57, C.v. €670 w/o premium for franking, Est. $400-$500 (Image)