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, Pyotr Ilyich Tchaikovsky, 15k-60k, complete set of five in top right corner sheet margin blocks of four, in addition block of 50k in claret shade, post office fresh, full OG, NH, VF, Est. $250-$300 , Sc. #789-93