Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 3

Soviet Union Stamps of 1924-40

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Start price: $150

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1940, Reunification of Western Byelorussia and Ukraine with the USSR, 60k indigo, horizontal pair imperforated between stamps, lightly cancelled at the middle, VF, Est. $250-$300 , Sc. #770 var