Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 274:
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, no gum as issued, VF, Unitrade #10 Pv, ii, iii, C.v. CAD$580, Est. $150-$180, Scott #10
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