Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Austria - Pioneer Flights - 1933 (May 14), First Flight Graz - Maribor postcard, addressed to Italy, franked by Pilot 80g gray green, Austrian and Yugoslavian Flight markings, Graz ''14.V.33'' ds is alongside, Rome arrival marking on front and reverse, VF, Est. $100-$150, Scott #C22