Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 2
Lot 840:
1977, Nikolai Chernyshevsky, Writer and publicist, die proof of 4k in black, artist N. Cherkasov, engraver L. Mayorova, size 89x118mm, printer’s markings at sides, no gum as produced, VF and very rare, Est. $400-$500, Scott #4678
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