Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2
Lot 907:
1978, History of Postal Services, (4k-16k), complete set of five die proofs of engraved part of the design, artist G. Komlev with group of engravers, approximate size 120x90mm, printer’s markings at sides, produced on paper without gum, mostly VF and very rare in complete set, Est. $2,500-$3,000, Scott #4715-19
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