ΑΘΗΝΑΙ*20.VI.34 zeppelin flight registered cover to "BUENOS AIRES*28.JUN.34" by GZ, all appropriate transits canchets, commemorative canc. "1934*LUFTSCHIFF GRAF ZEPPELIN ARGENTI...?", air-cachets type 15aA in black, 31a in violet and 31bB in violet, (Hellas FF341A3).