Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 426:
1860-63, Queen Victoria, six imperforate plate or trial color proofs of 8½c, 10c or 12c, one with diagonal ”Specimen” overprint, all printed on India paper, two – card mounted, nice and fresh, no gum as produced, VF, Unitrade #11P, 12TC, i, xii, 13P, TC, C.v. CAD$610, Scott #11-13
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