Plain cover franked with 1920 300rs rose red 'Industry' definitive issue and 1930 5,000rs green, 10,000rs carmine and 20,000rs ultramarine CONDOR issue with 'Graf Zeppelin - USA' overprint (SG 331 & Sanabria #Z6/Z8) all tied by PORTO ALEGRE 'Condor' cds's dated 22 MAI 1930. Flown on the first 'Sudamerikafahrt'. Addressed to USA with large RECIFE 'Condor' transit cds dated 26 MAI 1930 on reverse with illustrated LAKEHURST 'Zeppelin' arrival mark in green on reverse. Cover has small faults but a rare set used on cover. (Sieger #57)