Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Belgium and Belgian Congo - 1934 (June 3 and July 1), cover and postcard sent from Aviation Exhibitions in Brussels and Antwerp respectively, each one franked by two stamps, including Airplane over Ostend 50c blue and bearing poster stamp from exact Exhibition, addressed to Paris or Berlin, all appropriate markings, VF, Est. $150-$200, Sc. # C1