Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 1
Lot 309:
1860-63, Queen Victoria, imperforated plate proofs of 8c in blue green and 12½c in black, two ABN imprint blocks of four, printed on India paper and mounted on cards, no gum as produced, VF, Unitrade #11P, 13P, C.v. CAD $440++, Scott #11, 13
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