Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 2
Lot 618:
1860-63, Queen Victoria, nine imperforated proofs of 1c with diagonal ”Specimen” overprints, printed on India, six of which – card mounted, vertical pair in black with red overprint of types B and D, and seven in vermilion with green overprints, a single with type A, pairs of types B-D, C-C and C-D, no gum as produced, VF, Unitrade #8P, 8TC, var, CAD$880 as singles, Est. $300-$400, Sc. #8
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