Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 1
Lot 509:
1935, 1c-$1, complete set of 11 imperforated plate proofs, printed on India paper and mounted on cards, high values with sheet margins, no gum as issued, NH, VF, Unitrade #217P-27P, C.v. CAD $1,800, Est. $700-$800, Sc. # 217-27
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