Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2
Lot 1302:
1918, black overprints (type 17) on perforated 2k-70k and imperforate 1r, including horizontal (3k) and vertical pairs (20k), all are postally used, F/VF, ex-Dr. Zelonka, C.v. $1,026, Est. $400-$500,Bulat#1641/58
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