Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 1
Lot 77:
1927, Yukon Airways and Exploration Co. Ltd, reversed image die proof of 25c in black, printed on thick card, size 98x75mm, no gum as produced, NH, VF, C.v. CAD$450, Est. $250-$300, Sc. # CL42
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