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

Soviet Union 1923-40

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Start price: $100

Buyer's premium:

1926, definitive issue, 1k-5r, imperforate complete set of 20, most with sheet margins, printed on watermarked paper, full OG, NH, VF, 3k and 6k with neat expert’s hs, Est. $200-$250, Scott #34-25 imp