Bidspirit auction | Poland - Russian stamps used

Poland - Russian stamps used in the Kingdom of Poland - 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