Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 437:
Description
1897, imperforate plate proofs of 1c in black and 6c in brown, vertical and horizontal pairs, printed on card mounted India paper, no gum as produced, VF, Unitrade C.v. CAD $700, Est. $150-$200, Scott #66, 71
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