Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Brazil - Pioneer Flight - 1931 (July 23), Dornier Do X Flight cover from Curitiba to Germany, franked by six values, including five air post stamps, tied by Parana-Curitiba ''23.VII.31'' ds, red flight marking, NYC ''AUG 27.1931'' drop postmark, no German arrival as often, VF, Est. $200-$250, Scott #C18 x2, C20 x3