Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 1
Lot 511:
1935, 5c blue, horizontal pair imperforated vertically, full OG, NH, VF with ”HHH” hs on reverse, C.v. $340, Unitrade C.v. CAD$450, Est. $150-$200, Sc. # 221a
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