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: $200

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1944 (September 8), Note of Military Department of the Union of Polish Patriots in the USSR to Poles resides on the Soviet territory and liable for military service, sent free-frank from Moscow to Samarkand, Soviet censorship marking, 1/3 of aviator 30k blue (10k) placed upon arrival to Samarkand (1.10.44) as a postage due, because only Soviet Army correspondences sent without paying postage at that time, some wear and tears, still F/VF and extremely rare, Est. $300-$400, Sc. #736