Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 3
Lot 1514:
1918, black overprints (type 8) on perforated 3k and imperforated 1r, full OG, previously hinged, VF, both are properly expertized, Bulat #1494-95, C.v. $225, Est. $100-$150
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