Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Austria - 1933 (May 14), Graz - Maribor First Flight postcard, 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-$120 , Sc. #C22