Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 227:
Description
1860, Queen Victoria, imperforate plate proof of 10c in vermilion, vertical strip of three printed on India paper and mounted on card, green diagonal overprint ”Specimen” of types D-B-C, penciled positions 64/74/84, no gum as produced, VF, Unitrade #12P iii, i, ii, C.v. CAD$500, including 100% premium for 3 se-tenant types, Est. $200-$250, Scott #12
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