Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 2
Lot 763:
1906, 5r dark blue, green and pale blue, bottom right corner sheet margin single printed on vertically laid paper, imperforated at bottom, full OG, very light trace of hinge, VF and scarce, Est. $1,000-$1,200, Scott #71 var
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