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

Soviet Union

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Start price: $300

Buyer's premium:

1958, Astronomical Congress, 60k light blue, violet and yellow, ”UAU” variety at the top right, mounted on well inscribed page from a Collection, full OG, NH, VF, Est. $500-$600, Sc. # 2093 var