Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 1
Lot 136:
GROUP OF 3 ITEMS: 1925-36, postcard from Riga to Danzig via Königsberg of 1925, cover from Liepaja to Vienna (1925) and registered cover from Riga to Belgium, franked by nine 10s deep green on watermarked Swastika paper (1936), appropriate markings, minor flaws, mostly F/VF, Est. $150-$200, Sc. # C1-2, C6
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