Germany, 1930 Graf Zeppelin Sudamerika Fahrt  First round the world flight bearing the 1st South-American trip of the airship "Graf Zeppelin LZ 127'  2m & 4 m  stamps in pairs  Mi:DR 438Y-439Y, SG456a- 457a. all cancelled with red "Sudamerika Fahrt" and violet "Europe Pan-America Round Flight" diamond cachets on front Sieger  Si.57B ; and 'on board '(19 May) cds,  cover prepared after the stop at Seville, sent to F’hafen with 6.6.30 receiver, quite attractive, very fine (Sieger 57g)