Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 2
Lot 862:
1977, History of Aviation, 4k-20k, complete set of six die proofs in gray black, artist E. Aniskin, engravers M. Silyanova and V. Smirnov, approximate size 120x100mm, each one with side printer’s markings, printed on gummed paper with hinge traces, VF and extremely rare, especially in complete set, Est. $2,500-$3,000, Scott #C109-14
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