Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 2
Lot 837:
1977, Marshals of the USSR, Leonid Govorov, Ivan Konev, Konstantin Meretskov and Vasily Sokolovsky, four die proofs of 4k in issued colors, artists A. Filippov and N. Dvornikov, approximate sizes 86-88×118-119mm, printer’s markings at sides, no gum as produced, VF and very rare, especially in complete set, $1,500-$2,000, Scott #4545-48
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