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: $250

Buyer's premium:

1978, sunken die proof plate form for ”Vifag” printing machine, containing 18 different types of engraving, size 121x100mm, produced on gummed stamp paper with traces of hinging, VF and extremely rare, Est. $400-$500