Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2
Lot 657:
Description
1864-70, 10k brown and blue, perforation 14½x15, a single printed on very thick paper (over 0.1mm) without watermark, cancelled by black ”BW” inside concentric circles (Bydgoszcz-Warsaw railway); and 1k black and yellow on horizontally laid paper with ”1” inside four squares cancel (type II by Bojanowicz), both are VF, Est. $150-$180, Scott #15, 19
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