Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 2
Lot 620:
1860-63, Queen Victoria, large die imperforated proof of 12½c in black on India mounted on reduced sunken die card, proof size 41x40mm, several pencil notations on reverse of the card, no gum as produced, VF and very scarce, NSSC 10dp1, C.v. US$2,000 for full size card, Est. $600-$800, Sc. #13
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