Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 1
Lot 564:
1927, Confederation issue, 20c orange, vertical pair imperforated horizontally, full OG, NH, VF and scarce, only 250 pairs were produced, C.v. $275, Unitrade C.v. CAD$500, Est. $200-$240, Sc. # E3c
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