1923, All-Union Agriculture Exhibition, imperforated 1r and 2r, each one with initials ''Obrazets'' in red at the top and bottom, full OG, previously hinged, VF and scarce (Image)

1924, definitive issue, peasant 30k violet, litho printing, horizontal imperforated pair with parts of neighbor stamps at top and bottom, double impression (one inverted), horizontal invalidating perforation, full OG, NH, VF and a spectacular item (Image)

1924, Lenin Mourning issue, 3k-20k, imperforated complete set of four in horizontal pairs, wide frame, three with sheet margins, full OG, NH, VF (Image)

1923, definitive issue, peasant 50k brown, typo printing, nice enlarged margins imperforated single, bold color, full OG, VLH, VF and rare, C.v. $6,750 (Image)

1925, definitive issue, worker 8k brown olive, perforation 12, nicely centered, full OG, NH, VF, I. Kirzhner certificate, C.v. $2,000 (Image)

1925, Lenin Mausoleum, imperforated proof of 7k in violet brown printed on thick Goznak paper with text on reverse, slight ironed fold and tiny natural inclusion, no gum as produced, NH, VF appearance (Image)

1925, Lenin Mausoleum, 7k-40k, imperforated complete set of four used on local registered cover in Moscow, 1st All-Union Philatelic Exhibition ''25.1.25'' special cancellation, postmarked on arrival, light fold away from the stamps, F/VF (Image)

1925, definitive issue, imperforated proof of peasant 2k in black, bottom margin horizontal pair printed on watermarked paper, full OG, NH, VF (Image)

1928, definitive issue, peasant 9k red, horizontal position of watermark Borders and Rosettes, full OG, NH, F/VF (Image)

1925, definitive issue, soldier 18k violet, imperforated single with nice margins all around, vertical varnish lines, perfect quality in every respect, full OG, NH, VF, N. Mandrovski certificate (Image)

1925, Academy of Sciences, perforated proofs of 3k and 15k in issued colors, complete set of two, printed on thick paper without watermark, full OG, NH, VF, expert's hs on reverse of each stamp (Image)

1925, Academy of Sciences, imperforated plate proof of 3k in yellow brown, printed on thick paper with Goznak text on reverse, nice and completely flawless, no gum as produced, NH, VF (Image)

1926, Esperanto Congress, 14k bluish green and violet, red typo overprint ''Obrazets'' at the bottom, perfect quality single, full OG, LH, VF and the only known example of that specimen until now, ex-V. Ustinovsky. According to his notes this overprint was produced by order of Genrikh Yagoda, Chief of Soviet Security and Intelligence Agency (NKVD), who was a prominent philatelist (Image)

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

1927, 40th Anniversary of the Esperanto, illustrated cover from Moscow to Leipzig, insufficiently franked by black surcharge 8k on soldier 7k brown (rate 14k), red ''T'' and boxed marking in German, mostly VF (Image)

1927, black surcharge (type I) 8k on Postage Due stamp of 10k dark blue, litho printing, perforation 12½, full OG, LH and fine stamp (Image)

1927, Creator of Esperanto Dr. Zamenhof, 14k yellow green and brown, top sheet margin imperforated single, full OG, NH (hinged on margin away from the stamp), VF (Image)

1927, 10th Anniversary of the October Revolution, 8k brown and black, right sheet margin horizontal imperforated pair with a part of neighbor stamps at the top, horizontal invalidating perforation, full OG, NH, VF (Image)

1927, definitive issue, imperforated sheet margin singles of 2k green, and 5k brown, horizontal imperforated pair of 10k brown, horizontal invalidating perforation lines, full OG, NH, VF (Image)

1928, 10th Anniversary of the Red Army, 8k-28k, complete set of four (all are NH), in addition 8k with ''birthmark on soldier's face'' and 28k with thick ''C'' varieties (both hinged), full OG, mostly VF (Image)

1929, registered COD cover for 287rub sent from Moscow to Leningrad, franked by three definitive stamps, including Lenin 3r dark green with perforation 10½, arrival ds, archival pinholes at left, mainly VF and scarce franking (Image)

1931-32, definitive issue, 1k-1r, imperforated complete set of nine, balanced margins all around, full OG, stamps of 4k and 1r are NH (last one with insignificant gum wave) or LH/hinged, VF (Image)

1932-33, Maxim Gorki, 15k brown and 35k ultra, complete set of two and balanced margins imperforated single of 15k, in addition stamp of 35k with a bulge on ''1'' in ''1892'', full OG, NH, VF (Image)

1932, Moscow Philatelic Exhibition, 15k and 35k, two maximum cards, one of which is bearing complete set of two tied by black special ds, the other one with 15k only and cancelled by red marking, both are VF (Image)

1932, advertising envelope ''Automotive Society Against Lack of Good Roads'', franked by Moscow Exhibition stamp of 15k brown black in horizontal pair and sent from the Exhibition to Leningrad, postmarked on arrival, slight traces of previous mounting, still VF (Image)