Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 319:
Description
1932-37, Sealing Fleet, imperforate trial color proof of 25c in black, vertical pair printed on paper without watermark, no gum as issued, NH, VF, Walsh NSSC 191g, C.v. US$460, Est. $200-$250 , Scott #197
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