1857, 10k brown and blue, imperforated single with numeral watermark ''1'', balanced margins, pre-philatelic cancellation of 1858 (apparently - Kursk), fresh quality, VF, C.v. $650, Est. $220-$250 (Image)

1858, 20k blue and orange, perforation 14½x15, printed on thin paper with numeral ''2'' watermark, neat dotted cancellation, nicely centered with intact perforation, VF, expertized by A. Rosselevitch, C.v. $1,700, Est. $500-$600 (Image)

1858, 30k carmine and green, perforation 14½x15, printed on thick paper with numeral watermark ''3'', rectangular dotted cancellation and tiny traces of violet ink, nicely centered, minor perf imperfection at top right corner, fresh quality, generally VF, C.v. $2,500, Est. $800- $1,000 (Image)

1863, City Post, 5k black and blue, horizontal pair, left stamp with broken shading on the left of ''G'' in ''Gorod.'' variety, full OG, VLH, VF, Est. $100-$150 (Image)

1866-70, 1k-30k, complete set of six, printed on horizontally laid paper, 20k has left sheet margin, post office fresh and nice unit, full OG, NH, VF, Est. $200-$250 (Image)

1866, 20k blue and orange, printed on horizontally laid paper, top sheet margin vertical gutter block of four, lovely item, full OG, NH, VF, Est. $400-$500 (Image)

1866, 20k carmine and green, top margin block of four printed on horizontally laid paper, upper right stamp has broken and dented outer frame at top, full OG, NH, VF, Est. $350-$450 (Image)

1883, 7r black and yellow, printed on vertically laid paper, nicely centered, full OG, previously hinged, VF, C.v. $800, Est. $300-$400 (Image)

1899 (March 19, Julian Calendar) Early Easter Lithographic color postcard, sent as Greetings from Libava (now Liepaja) to Berlin, arrival ''3/4'' (Gregorian Calendar) on the address side, fresh and VF, Est. $120- $150 (Image)

1904, Emperor Nicholas II, the Mouchon essay in black- and-white with small portrait (bust to right), printed on thin card, size 42x55mm, no gum as produced, VF, this item is a precursor of rectangular design proofs, Est. $400-$500 (Image)

1904, Emperor Nicholas II, the Mouchon essay in black- and-white with large portrait (bust to right), printed on ordinary paper, size 32x38mm, no gum as produced, VF and rare, Est. $400-$500 (Image)

1905, 7k blue, printed on vertically laid paper, complete pane of 25 (bottom left part of a sheet), open pre-printing paper fold is affecting fourth horizontal row, resulting in stamps of this row much larger then common ones, full OG, NH or LH mostly on margins (two stamps are hinged), VF and a spectacular error, Est. $600-$750 (Image)

1904, 1r brown, pale brown and orange, perforation 11½ instead of 13½, top right corner sheet margin block of four printed on vertically laid paper, control inscription in orange reads: ''A 04 A'', perfect condition in every respect, full OG, NH (hinged on margin far away from the stamps), VF and very rare multiple, this block had been sold in our Auction #77 (March 2018) for $5,750 including commission, Est. $5,000-$6,000 (Image)

1909, perforated proof of 10k in bright blue, bottom right corner margin single printed on wove paper without varnish lines, three instead of two lines of inner oval, extra two curls on sides of top ribbon (common stamp has three lines) and other differences from issued stamp, nice condition, no gum as produced, VF and scarce, expert's hs on margin, Est. $750-$1,000 (Image)

1908, 25k green and violet, complete sheet of 100 (four panes of 25), marginal inscription reads: ''Kred. Tip. 1908'', watermark Wavy Lines at top and bottom, slight natural pre-printing paper fold, which is scarce on early issues of these stamps, fresh condition, full OG, NH, VF, Est. $120-$150 (website photo) (Image)

1911-12, 70k light brown and orange, complete sheet of 100 (25x4), watermark Wavy Lines at top and bottom, no control markings, some marginal flaws, full OG, NH, VF, Est. $120-$150 (website photo) (Image)

1913, Romanov Dynasty, Alexander III, imperforated proof of central vignette of 3k in carmine, size 27x45mm, printed on thick chalk-surfaced paper, 2mm thin at top margin, did not affect the design, no gum as produced, VF, ex-Norman Epstein, Est. $350-$400 (Image)

1913, Romanov Dynasty, Nicholas II, imperforated die proof of central vignette of 10k in dark blue, size 49x66mm, printed on thick chalk-surfaced paper, no gum as produced, VF and scarce, ex-Norman Epstein, Est. $400-$500 (Image)

1915-17, 5r blue, green and pale blue, perforated block of 25 with 3 ''V'' labels (top part of a sheet with no selvages), second stamp of the 3rd row with wide ''A'' in ''POCHTOVAYA'' variety (position 13), insignificant (3-4 tips) separations possible, full OG, NH, VF, Est. $140- $180 (Image)

For Mailman (V Pol'zu Pochtaliona). 1909, red overprint on revenue stamp of 15k blue and rose, block of four, top stamps without overprint, while bottom ones bearing double overprint (one inverted) due to amazing overprint shift, full OG, NH (bottom stamps) or LH, VF and extremely rare, according to our records the only block of four and the vertical pair of this error are known, the last time it was sold in our Auction #73 for $5,750 including commission, Raritan Stamps guarantee, SC #J1, Est. $5,000-$6,000 (Image)

Postal Stationery items. 1872, stationery postcard 5k green, no dot after ''adresa'' on the left vertical inscription, sent from Mogilev to Moscow, appropriate markings, mostly VF, SC #PC2 var, Est. $120-$150 (Image)

Postal Stationery items. 1913, Romanov Dynasty issue, proof for postal stationery card of 4k in red, names of artist (Lancere) and engraver (Lundin) printed at the bottom of stamp, produced on a thin card, size 140x90mm, VF and very rare, especially in form of complete card, SC #PK25, Est. $1,000-$1,500 (Image)

Prison Correspondences. 1909, stationery postcard 3k red, sent to St. Petersburg Solitary Confinement Prison ''Kresty'', addressed to the political prisoner Petr N. Kholodilin, violet oval marking ''Verified by Assistant of Prosecutor'', Indian ink cross, mostly VF, Est $120-$150 (Image)

Romanov Dynasty Stamps Franking. Postal History Group: 1913-17, 24 items, including seven stationery cards, one letter-card and letter-card booklet, two parcel cards (one with 1r stamp franking), nice destination and origin markings, such as cover to Shlisselburg Prison, several Train stations and TPO markings, neatly arranged on album pages, mainly fresh and F/VF, Est. $350-$400 (website photo) (Image)