Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 1139:
1931, Airship over the Kremlin, 20k deep carmine, top margin imperforate single with vertical position of watermark Borders and Rosettes, full OG, LH, VF and scarce watermark variety, Est. $300-$400, Scott #C17 var
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