Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 228:
Description
1860, Queen Victoria, imperforate plate proof of 12½c in black, vertical strip of three printed on India paper and mounted on card, red diagonal overprint ”Specimen” of types D-B-C, penciled positions 64/74/84, no gum as produced, VF, Unitrade #13P iii, i,ii, C.v. CAD$500, with 100% premium for 3 se-tenant types, Est. $200- $250, Scott #13
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