Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2
Lot 1238:
Description
1918, violet overprint (type 2f) on imperforate 1r brown, pale brown and orange, left sheet margin single with inverted background, full OG, NH, VF and scarce, not mentioned in the catalog, expertized by Dr. Seichter, Est. $150-$180 , Bulat #438 var
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