1857, 10k brown and blue, four-side margin imperforated single with numeral watermark ''1'', pen cross cancellation, VF, C.v. $475, Est. $200-$300 (Image)

1857, 10k brown and blue, imperforated single with numeral watermark ''1'', pen cancellation expertly removed, clear margins at all sides, appears as an unused example, Est. $200-$300 (Image)

1857, imitations of imperforated die proofs of 10k in brown and green, brown and carmine and green and carmine, typo printing on white paper without watermark, no gum as produced, nice spacefillers of VF appearance, Est. $200 -$300 (Image)

1858, 10k brown and blue, perforation 14½x15, printed on thin paper with numeral ''1'' watermark, intact perforation and fresh colors, unused, no gum, VF and scarce, minor corners soiling not mentioned in N. Mandrovski certificate, C.v. $4,400 for stamp w/o gum, Est. $1,000-$1,500 (Image)

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

1884, 3.50r black and gray and 7r black and yellow, complete set of two on vertically laid paper, stamp of 3.50r with altered perforation at bottom (not mentioned in the certificate), large part of OG, fine centering, A. Farberov individual certificates, C.v. $2,000, Est. $750-$1,000 (Image)

1906, 5r and 10r, complete set of two printed on vertically laid paper, each one with sheet margin, full OG, NH, VF, C.v. $1,210, Est. $300-$400 (Image)

1906, Coat of Arms, 5r dark blue, green and pale blue, 10r carmine, yellow and gray, complete set of two printed on vertically laid paper, sheets of 25 with control ''V'' labels on edges, minor marginal flaws and slight gum waves in the middle of 10r sheet, perfect condition overall, full OG, NH, VF, and one of just a few sets of sheets survived, C.v. $30,250 as singles, Est. $12,000-$15,000 (Image)

1906, 5r dark blue, green and pale blue, printed on vertically laid paper, perforation 11½, nicely centered, full OG, LH, VF, C.v. $500, Est. $250-$300 (Image)

1913, Romanov Dynasty, Alexander III, 3k rose red, top margin imperforated single, narrow side margins (apparently cut of a stamp imperforated at top), full OG, trace of hinge, VF appearance (Image)

1913, Romanov Dynasty, Alexander III, 3k rose red, a single with double impression of the design, full OG, previously hinged, VF, expert's sign on reverse, C.v. $600, Est. $300-$400 (Image)

1913, Romanov Dynasty, Nicholas II, 10k blue, in addition design is printed on gum side and placed diagonally upside down, full OG, NH, VF and a spectacular not offset, but printed error, Est. $150-$200 (Image)

1913 (March 11), large size registered cover from Moscow to Berlin, franked by seven stamps of Romanov Dynasty issue from 2k to 70k, arrival ds is on reverse, minor wrinkles, still F/VF, Est. $150-$200 (Image)

1915, Romanov Dynasty money stamps, Alexander I, 20k olive green with double impression, horizontal imperforated pair, no gum as produced, NH, VF, Est. $150-$200 (Image)

1917, World War I Propaganda Forgery of money stamps, 20k olive green and 15k orange brown, set of two stamps, inscriptions on reverse reads: 20k - ''In circulation on a par with bankruptcy of silver coins'', 15k - ''In circulation on a par with robbery and cheating rulers'', unused without gum as produced, VF and very rare, Est. $800-$1,000 (Image)

1919, 7r dark green and pink, left sheet margin horizontal imperforated pair with horizontal varnish lines, enlarged margins at top and bottom, clear at right, full OG, NH, VF, expertized by A. Rosselevitch and Romeko, C.v. $4,200++, Est. $2,000-$2,500 (Image)

Money Letters. 1913 (November 25), money letter for 250 rub (666.67FFr) sent from Riga to Germany, franked by two Romanov Dynasty adhesives, wax seals with ''A.E.'' initials (in good preservation), Radeberg ''15.12.13'' arrival ds, mostly VF, Est. $150-$200 (Image)

Nice Postal History Group. 1879-1918, 22 items, representing 17 different postal stationery envelopes, including 10 early ones of 5k, 8k, 10k, 7k/8k, 7k/10k of 1879-83, several Romanov Dynasty stationeries and covers franked by Romanov's stamps, including one mute cancelled from Pinsk to Petrograd, very well preserved material, mostly VF, Est. $300-$400 (Image)

Postal Stationery items. 1896, essay of letter card with pre-paid reply 10k+10k blue, each part with red overprint ''PROEKT'', insignificant perf separation at right, still fresh, VF and very rare, Standard Cat. #ES6 A, Est. $1,000-$1,200 (Image)

Postal Stationery items. 1899, letter-sheet of 7k blue, series 1, printed in St. Petersburg, containing over 30 various advertisements inside and on reverse, folded several times, some flap wearing, still VF, Est. $400-$500 (Image)

Proofs from the Tsar Collection. 1913, Tercentenary of the Romanov Dynasty, Peter the Great, imperforated large die proof of 1k in deep rose, printed on chalk-surfaced thick paper, size 42x47mm, no defects, fresh and VF, Est. $1,000-$1,200 (Image)

Proofs from the Tsar Collection. 1913, Tercentenary of the Romanov Dynasty, Alexander II, imperforated large die proof of 2k in black, printed on chalk-surfaced thick paper, size 39x46mm, previously hinged, no thins or other hidden defects, VF, proofs produced in black are very rare, Est. $1,400-$1,800 (Image)

Proofs from the Tsar Collection. 1913, Tercentenary of the Romanov Dynasty, Alexander III, imperforated large die proof of 3k in orange, printed on chalk-surfaced thick paper, size 38x49mm, previously hinged, no typical thins, VF and rare, Est. $1,000-$1,200 (Image)

Proofs from the Tsar Collection. 1913, Tercentenary of the Romanov Dynasty, Peter the Great, imperforated large die proof of 4k in red, printed on chalk-surfaced thick paper, size 41x48mm, previously hinged, no thins or other defects, VF and rare, Est. $1,000-$1,200 (Image)

Proofs from the Tsar Collection. 1913, Tercentenary of the Romanov Dynasty, Catherine II, imperforated large die proof of 14k in black, printed on chalk-surfaced thick paper, size 38x47mm, VF and very rare, only limited quantity of 14k proofs were printed, proofs in black are extremely rare, Est. $1,500-$2,000 (Image)