1923, Petrograd definitive issue, worker 1k orange, litho printing, harrow perforation 14½x15, bottom left corner sheet margin block of four, flawless condition, full OG, NH, VF and scarce multiple, SC #13 var (Image)

1924-25, definitive issue, worker 4k carmine, typo printing, perforation 14½x15, double impression, full OG, NH, VF, SC #42 var (Image)

1924-25, definitive issue, peasant 50k brown, typo printing, perforation 14½x15, full OG, previously hinged, F/VF, SC #54 (Image)

1924-25, soldier 3r dark brown and pale green, typo printing, type I, perforation 13½x10, fresh condition, full OG, LH, F/VF centering, neat owner's hs on reverse, SC #57A (Image)

1925, Lenin Mausoleum, imperforated proof of 7k in olive brown, printed on thick security Goznak paper, no gum as issued, NH, VF (Image)

1925, Lenin Mausoleum, 7k-40k, imperforated complete set of four, used on registered cover from 1st All-Union Philatelic Exhibition in Moscow to Saratov, tied by special Exhibition ''26.1.25'' postmark, arrival ds on reverse, VF (Image)

1926, definitive issue on improved white paper, 7k-5r, imperforated complete set of eight, most with sheet margins, fresh condition, full OG, NH, VF (Image)

1926, definitive issue, worker, complete set of five imperforated trial color proofs of 8k in yellow, green, carmine, blue and red lilac, printed on white improved paper, sheet margin horizontal pairs, flawless quality, full OG, NH, VF and scarce set (Image)

1926, definitive issue, Vladimir Lenin, 1r-3r, complete set of three, horizontal watermark Borders and Rosettes, full OG, NH, VF, SC #128-30 (Image)

1927, black surcharge 8k on Postage Due stamps of 1k- 14k, complete set of seven, printed on watermarked paper, surcharge on 3k stamp with inverted ''P'' in ''Pochtovaya'' variety, which is very scarce, full OG, NH, VF, Scott #366-72 (Image)

1929, Third definitive issue, peasant 80k yellow brown, left sheet margin single will missing most part of yellow background, paper adhesion at the bottom perforation, otherwise full OG, NH, VF appearance, N. Mandrovski certificate, SC #240 Ta (Image)

1929, Iron Furnace, 20k green, perforation L10¾ instead of comb 12½x12, intact perforation and very fresh unused single, expertly regummed, VF appearance of this rare perforation variety, SC #247A (Image)

1933, Leningrad Philatelic Exhibition, red surcharges 30k on 15k and 70k on 35k, complete set of two, full OG, NH, VF, expertized by L. Hovest, SC #315-16 (Image)

1933, Leningrad Philatelic Exhibition, maximum card used for Moscow Exhibition, but with additional blue overprint ''Leningrad. State Museum of Revolution'' on front, franked by three values including red overprint 35k on 15k brown black on reverse, tied by Exhibition postmark and sent by registered mail from Leningrad to Harbin, trace of hinge on front, sill VF (Image)

1933, Ethnographic issue, 1k-35k, complete set of 21, occasional gum wrinkles possible, nice and fresh quality unit, full OG, NH, F/VF and difficult set in sound condition, SC #317-37 (Image)

1933, Ethnographic issue, Tajiks, trial color perforated (11½) proof of 15k in brown, phototype printing, a part of ''T'' red overprint ''Project'', two translucent tips of perforation, fresh quality single removed from a presentation card and gummed, F/VF and scarce, SC #334 (Image)

1934, Sverdlov and Nogin, 10k ultramarine and 15k red, complete set of two, nice centering, full OG, NH, VF, SC #367-68 (Image)

1934, First Decade without Lenin, 1k-30k, complete set of six, 5k and 30k with tiny spots of skipped gum, fresh quality unit, full OG, NH, VF, SC #381-86 (Image)

1934, First Decade without Lenin, perforated (11) trial color proof of 20k in violet brown and blue, perforation separated by scissors, fresh, no gum, VF and scarce, SC #385 (Image)

1935, Moscow Spartacist Games, 1k-40k, complete set of ten, full OG, LH, VF, SC #406-15 (Image)

1935, Leo Tolstoy, 3k greenish black and violet, perforation 11, horizontal pair imperforated between stamps, full OG, NH, VF and very scarce, SC #429A Pb, C.v. 150,000P (Image)

1935, Leo Tolstoy, 20k green and black brown, perforation 11, vertical pair imperforated between stamps, neatly cancelled, VF, C.v. $1,100, SC #431A Pf (Image)

1935, Revolutionary Heroes, Mikhail Frunze and Nikolai Bauman, trial color perforated (13¼) proofs of 2k and 4k in brown black, printed on watermarked Borders and Rosettes paper, text at the bottom thinner then on issued stamps, fresh, no gum, probably removed from presentation card, VF and very rare, ex-M. Liphschutz Collection, SC #432-33 (Image)

1936, Pioneers Helping Post, 2k brown red, perforation 11, right sheet margin single, imperforated on the right, CTO with full OG, VF, SC #436 Pd (Image)

1936, Pioneers Helping Post, 5k rose lake, perforation 14, vertical pair, bottom stamp with ''thin sickle'' variety, full OG, NH, VF, SC #438A, var (Image)