Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 1042:
1931, Airmail Pictorial issue, imperforate plate proofs of 15c, 50c and $1 in black, complete set of three on bond paper, nice margins around, no gum as produced, NH, VF and scarce, $400-$500, Scott #C6-8
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