Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 1262:
1991, Cardinal, imperforate (simulated perforation) large die proof of 30k multicolored with ”30. USA” in blue, printed on chromaline card, size 151x190mm, formatted like a notepad with black cover and extra page with ”window”, no gum as produced, VF and extremely rare item, which is not listed in Scott, Est. $600-$800, Scott #2480
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