Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2

Soviet Union of 1923-40

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Start price: $75

Buyer's premium:

1939, Non-Stop Flight to Far East, 15k, 30k and 60k, complete set of three on cover locally sent in Leningrad, backstamped, F/VF, Est. $100-$150,Scott #718-20