Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2
Lot 1310:
1918, black overprints (type 33) on perforated 4k-3.50r and imperforate 15k, full/large part of OG, mostly VF, properly expertized, ex-Dr. Zelonka, C.v. $447,Bulat#1876/92
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