Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2
Lot 1133:
1918, black overprint (type 36) on perforated 15k and 3.50r, both are postally used, minor perf irregularities at top of 3.50r, still F/VF, expertized by Dr. Seichter and J. Bulat, C.v. $260, Est. $120-$150, Bulat #1929-30
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