Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2
Lot 1298:
Description
1918, black overprint (type 10) on imperforate 20k blue and red, neat corner cancellation, VF and scarce, expertized by U.P.V. and others, this stamp is not listed in the Catalog, Est. $150-$200
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