Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 399:
1937, 1c-48c, ten imperforate plate proofs in issued colors (no 3c values), proof of 1c on bookend paper, nice margins, no gum as produced, VF, Walsh NCCS #216, 219-27, C.v. US$885 Est. $300-$400, Scott #233/43
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