Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 383:
1932-37, Queen Mary, 3c orange brown, vertical pair imperforate between stamps with straight edge at bottom, full OG, NH, VF and scarce, C.v. $450, Unitrade C.v. CAD $600, Est. $150-$200, Scott #187e
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