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

Soviet Union

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Start price: $100

Buyer's premium:

1989, International Letter Writing Week, 5k multicolored, bottom left corner sheet margin imperforated block of four with colored signs at the bottom edge, printed on thick chalk-surfaced paper, no gum as produced, NH, VF and guaranteed genuine, Est. $150-$200, Sc. # 5795 imp