Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 3
Lot 1495:
1918, black overprints (Type 1 Multiple Handstamp) on perforated 1k-70k, complete set of 16 in strips of five, full OG, NH or LH/hinged, F/VF, ex-Dr. Zelonka, Bulat #661-76, C.v. $728 as single stamps, Est. $400-$500
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