1931 BRAZIL / 3. SÜDAMERIKAFAHRT 1931, first flight Brazil - Europe, airmail letter to Germany franked with. i.a. Zeppelin stamp Mi.367, CDS CURITIBA 31.VIII.31, supplemented with green cachet PREMEIRO VOO, on reverse arrival FRIEDRICHSHAFEN 7.9.31; good condition, cat. Sieger 125.B