Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 385:
1932-37, Caribou, 5c deep violet, Die II, horizontal imperforate pair and imperforate trial color proof of 5c in black, Die II, horizontal pair on watermarked paper, no gum as produced, NH, VF, Unitrade C.v. CAD$150 plus Walsh NSSC 182ae, C.v. US$500, Est. $200-$250, Scott #191b
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