Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 224:
Description
1860, Steamship, imperforate plate proof of 12½c in dark blue, vertical strip of three printed on India paper and mounted on card, red horizontal overprint ”Specimen” of types D-B-C, penciled positions 45/55/65, no gum as issued, VF, Unitrade #10 Pv, ii, iii, C.v. CAD$580, including 100% premium for 3 types in se- tenant, Est. $200-$250, Scott #10
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