1858, 10k brown and blue, perforation 14 1/2x15 (slightly defected), numeral watermark ''1'', used on entre letter from St. Petersburg to Narva, tied by experimental dotted ''1'' cancellation (with extra two pairs dots in front and behind of ''1''), pre-philatelic two-line St. Petersburg red ''22.FEB.1858'' date stamp is alongside, F/VF, Est. $200- $250 (Image)

1866-70, 1k-20k, complete set of six, perforation 14 1/2x15, printed on horizontally laid paper, three stamps with margins, full OG, NH, VF, Est. $200-$250 (Image)

1869, 3k black and green, 5k black and lilac, both with perforation 14 1/2x15 on paper without watermark, 20k blue and orange on horizontally laid paper, used on entire letter from St. Petersburg to Montpellier, tied by dotted oval ''S.P.B.'' marking along with normal date stamp, arrival ds on reverse, F/VF, Est. $150-$200 (Image)

1875-79, 7k, 8k, 10k and 20k, set of four values in top left sheet margin (full or partial) blocks of four on horizontally laid paper, full OG, NH, VF, Est. $1,000-$1,200 (Image)

1883, 2k dark bluish green, imperforated single with balanced margins on horizontally laid paper, background is slightly shifted to the left, bold color and strong impression clearly visible on reverse, redistributed part of original gum, VF and rare variety, C.v. $1,100, Est. $500-$600 (Image)

1889-92, 1k orange, right sheet margin imperforated block of four with large red ''Obrazets'' initials, printed on horizontally laid paper, slight mostly marginal folds and minor full original gum soiling, NH, VF and rare, especially in multiple, Est. $500-$600 (Image)

1889-92, 3.50r black and gray, 7r black and yellow, set of two high values on horizontally laid paper, full OG, previously hinged, VF, C.v. $240, Est. $150-$200 (Image)

1889-92, 7r black and yellow, bottom sheet margin single printed on horizontally laid paper, the ''key'' stamp from the set, full OG, barest trace of hinge, VF, C.v. $190, Est. $100-$140 (Image)

1902, rectangular imperforated essay of 7k in dark rose, unissued design with Coat of Arms in the middle, printed on thin card, perfect quality, no gum as issued, VF and rare, Standard Cat. #UD43 var, Est. $1,500-$2,000 (Image)

1912-17, 15k red brown and blue, printed on paper with vertical varnish lines, inverted offset of the design on the face, appearing as double impression, full OG, very light trace of hinge, VF and a spectacular item, P. Buchsbayew certificate, Est. $140-$180 (Image)