Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 2
Lot 666:
1864, Cents issue, Queen Victoria, imperforated trial color proof of 2c in claret, left sheet margin vertical strip of four with ABN imprint, India paper mounted on card, sheet positions are penciled on reverse (61/91), fresh, VF and scarce multiple, Unitrade #20TCi, C.v. $1,400++, Est. $500 -$600, Sc. #20
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