Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2
Lot 805:
1920, 10h dark green, perforation 13¾, full OG, NH, F/VF, expertized by R. Gilbert, J. Karasek and others, Pofis #145B, C.v. CZK8,000, Scott #66a
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