Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 1376:
1859, Queen Victoria, imperforate trial color proof of 12½c in bluish green, top sheet margin block of four printed on India paper and mounted on card, sheet positions 5-6/15-16 penciled on reverse, no gum as issued, NH, VF, Unitrade #18TC, C.v. CAD $1,200++, Scott #18
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