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: $200

Buyer's premium:

1927, black surcharges (type II) 8k on postage due stamps of 2k and 3k printed on watermarked paper, full OG, NH (3k) or LH, VF, Est. $400-$500,Scott #367-68 var