Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2
Lot 1115:
1918, inverted black overprints (type 8) on perforated 10k, 10k/7k and 15k, imperforate 1k-5r, the total is ten values, full OG, mainly LH, VF, all are properly expertized, C.v. $430, plus imperf 5k and 70k not listed in the Cat. with inverted overprints, Est. $300-$350, Bulat #1285a/ 306a
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