Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Surinam - Dornier ''Do-X'' Flight - 1931 (August 18-19), cover from Surinam to Trinidad, franked by complete overprinted ''Do. X'' set of seven, tied by special date stamp in black, violet confirmation and Post of Spain ''AU.19.1931'' arrival markings are on reverse, F/VF, Est. $300-$400, Scott #C8-14