Russian stamps used in the Kingdom of Poland. 1864-68, five 1k black and yellow, one 5k black and lilac, all with perforation 12½, used on cover from Kolo to Warsaw, tied by ''223'' inside concentric circles cancel, 10/8 Kolo marking is alongside, Warsaw red ''11/8'' ds on reverse, minor soiling, still F/VF and very rare, ex-Eichenthal, Liphschutz (Image)

Russian stamps used in the Kingdom of Poland. 1866, 10k brown and blue, perforation 14½x15, printed on paper without watermark, tied by ''241'' inside concentric circles on entire letter from Wloclawek to Bartenstein (then East Prussia, now - Bartoszyce, Poland), red Wloclawek date stamp is alongside, postmarked on arrival, F/VF (Image)

Russian stamps used in the Kingdom of Poland. 1883, two stamps of 1k black and yellow, printed on horizontally laid paper, used on entire wrapper of printed matter item (2k - postal rate), sent from Warsaw to Bistritz am Hostein (now Bystrice pod Hostynem - Czech Republic), postmarked on arrival, usual folds did not affect the stamps, VF and scarce, expertized by Z. Mikulski (Image)