Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 2
Lot 854:
1921, First Constantinople issue, complete set of 15 imperforated plate proofs in issued colors, printed on glossy paper (proofs of 15,000r and 25,000r brown do not exist), no gum as produced, NH, VF and scarce, Est. $400-$500 , Sc. #278/94
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