Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 1415:
1935, imperforate plate proofs of 1c-13c, complete set of six in horizontal (1c, 2c and 5c) or vertical pairs, printed on India paper and mounted on cards, no gum as issued, NH, VF, Unitrade C.v. CAD$1,500++, Scott #211-16
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