Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 1
Lot 510:
Description
1935, 4c yellow, 5c blue and 8c deep orange, imperforated plate proofs in horizontal pairs, printed on India paper and mounted on cards, no gum as produced, NH, VF, Unitrade 220P-22P, C.v. CAD$600++, Est. $250-$300, Sc. # 220-22
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