Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 3
Lot 1384:
1893, plate proof of 2k in black for frame only, imperforated complete sheet of 144 (18×8), printed on white wove ungummed paper, folded once between 9th and 10th vertical rows, scotch tape mounts at right margin, stamps are not affected, VF, unique and unlisted item, Est. $5,000-$6,000, Sc. #L11
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