1930 First Flight from La Paz to Germany, franked with six Zeppelin surcharges, also set of three "Z" overprints, all tied by 14 May 1930 pmks, with "Europa Pan-America Round Flight" and "Premier Correo Aereo Graf Zeppelin" cachets, v.f., with Friedrichshafen arrival pmk on back (Si.60D) (Image)

Est.$500