5. South America flight 1935, Paraguayan post, registered cover with set 22, 50 P. - 13, 50 $ Zeppelin stamp complete and on the back additional franking with special stamp CORREO - AEREO POR Count Zeppelin / JUNIO 1935 to Friedrichshafen with arrival postmark, in perfect condition, expertized Aisslinger BPP with attest, Zeppelin covers with the complete set are rare