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

Mongolia

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Start price: $75

Buyer's premium:

1959, Congress of Rural Economy, 30m green, bottom left corner sheet margin single, imperforate on the left, full original gum partly missing on the edge, NH, VF and scarce, Est. $150-$200, Scott #181 var