Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 451:
1922, 10c blue, wet and dry printings, two blocks of four of distinctly different shades, full OG, NH, VF, C.v. $1,040++, Unitrade C.v. CAD$1,920 as singles, Est. $300-$350, Scott #117, a
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