Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 3

Soviet Union

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Start price: $200

Buyer's premium:

1937, definitive issue, peasant 20k green on bluish green network, enlarged margins imperforated single, full OG, NH, VF, C.v. $950, Est. $350-$400, Sc. # 617Ab