Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 3
Lot 1092:
1857, imitations of imperforated die proofs of 10k in brown and green, brown and carmine and green and carmine, typo printing on white paper without watermark, no gum as produced, nice spacefillers of VF appearance, Est. $200 -$300 , Sc. #1
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