Worldwide Air Post Stamps and Postal History, One Man Collection of Tannu Tuva, Philatelic Rarities of the World, Part 1
Lot 304:
Description
1932-37, Sealing Fleet, 25c bluish gray, top sheet margin imperforate pair, and imperforate plate proof of 25c in black, horizontal pair printed on wove paper without watermark, full OG or no gum as issued, NH, VF, Unitrade C.v. CAD$450 plus Walsh NSSC 191g, C.v. US$460as singles, Est. $300-$350, Scott #197, a
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