Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 3
Lot 1057:
1906, 5r dark blue, green and pale blue, perforation 13½, bottom right corner sheet margin single printed on vertically laid paper, imperforate at bottom, full OG, very light trace of hinge, VF and scarce, suggested retail is $2,000, Scott #71 var
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