Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 363:
1933, Sir Humphrey Gilbert, die proof of 1c in black on watermarked paper, three-side printer’s markings, size 51x53mm, no gum as produced, VF and scarce, NSSC #196 dp5, C.v. US$700, Est. $400-$500, Scott #212
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