Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2
Lot 1858:
1979, Research Fleet, 1k-15k, complete set of six sunken die proofs in black, artist A. Axamit with group of engravers, each one with printer’s markings at sides, approximate size 120x100mm, printed on stamp gummed paper, 1k with hinge over scratched paper, traces of hinges, mostly VF and extremely rare in complete set, Est. $2,500-$3,000, Scott #4799-804
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