Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Belgium and Belgian Congo - 1938 (January 9), official postcard of the 1st International Exhibition of Pigeon Racing Federation, representing the Monument Pigeon-Soldier, bearing Princess Josephine 10c+5c slate green and tied by special Exhibition ''9.1.38'' postmark, numbered on reverse ''1550'', VF and scarce, Est. $150-$200, Scott #B200