Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 2
Lot 622:
1860-63, Queen Victoria, imperforated proof of 12½c in black, left sheet margin block of four on India paper mounted on card, ABN inscription at selvage, no gum as produced, VF, Unitrade #12P, CAD$240, Est. $100-$120 , Sc. #13
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