Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 2
Lot 974:
1979, Flag and Soviet Emblem, 4k multicolored, top right corner sheet margin horizontal imperforated pair, full OG, NH, VF and the most rare and expensive imperf of the period, Est. $4,500-$5,000, Scott #4795 imp
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