Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 132:
1939 (August 21), Day of Aviation, overprints in various colors on 10k-1r, complete set of five, used on registered air mail cover from Moscow to Buenos Aires, met appropriate air post rate of 2.30rub, arrival ds on reverse, F/VF, Est. $200-$300, Scott #C76-76D
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