Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 456:
Description
1927, Confederation, 20c orange, left sheet margin plate No.1 block of six (2×3), inscription on margin reads: ”OTTAWA No. A-1 943 O”, perfect centering, full OG, NH, VF, Unitrade C.v. CAD$875, Est. $250-$300 , Scott #E3
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