History of Aviation, Rare Stamps and Postal History of the World, Part 3
Lot 1343:
1918, black boxed overprint (type 2) on 7r black and yellow on vertically laid paper, full OG, previously hinged, VF and scarce, expertized by U.P.V., C.v. $150, Est. $100 -$150 , Bulat #856b
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