Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 2
Lot 621:
1860-63, Queen Victoria, five imperforated plate or trial color proofs of 12½c, in black, vermilion (2, one with diagonal Specimen, type B), two others are in green and orange, all printed on India paper, no gum as produced, VF, Unitrade #13P, TC, ii, v, ix, C.v. CAD$520, Est. $200-$240, Sc. #13
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