Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 1405:
1921, Coat of Arms, engraved die proof in black, die sunk on card, printing area 63x75mm, card size 150x229mm, imprint ”Canada – B-17” and text ”American Banknote Co. Ottawa” below the die, fresh, VF and rare, Est. $400-$500
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