Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 2
Lot 1076:
1876-77, 5k dark blue, block of 17 (bottom part of a sheet with couche), horizontal and vertical folds, full OG, mainly NH, F/VF and very rare, Chuchin #3, 3a, rank ”RR”, C.v. $7,500++, Est. $5,000-$6,000
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