Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 1
Lot 20:
1933 (May 14), Graz – Maribor First Flight 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
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