Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2
Lot 1108:
1918, black overprint (type 2) on perforated stamps of 15k-7r, set of nine, all are postally used, stamp of 35k has a pinhole, otherwise fresh, mostly VF and scarce assemblage, all are properly expertized, C.v. $1,260, plus 35k which is not priced in the Catalog, Est. $600-$650, Bulat #1038/48
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