Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 3

Soviet Union - Die Proofs Selection

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Start price: $750

Buyer's premium:

1980, Moscow River Bridges, 4k, 6k and 15k, complete set of three sunken die proofs in black, approximate size 100x120mm, printer’s markings at sides, printed on gummed stamp paper, traces of previous hinges, VF and very rare, Est. $1,200-$1,500, Sc. # 4892-94