Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 269:
Description
1860, Locomotive, imperforate proof of 1c in dark violet, vertical strip of three printed on India paper, each stamp with horizontal red ”SPECIMEN” overprint of types D, B and C, no gum as issued, fresh and VF, Unitrade #6Pv, iii, iv, C.v. CAD$800, Est. $250-$300, Scott #6
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