1924-25, definitive issue, worker 1k orange, typo printing, side margin imperforated horizontal strip of five, perfin ''Obrazets'', perfect quality, full OG, NH, VF and scarce item from the Postal Archives, Raritan Stamps guarantee (Image)

1924-25, definitive issue, trial color perforated and imperforated proofs of peasant 6k in gray and soldier 4k in black, the last one printed on watermarked paper and it has invalidating perforation, all with full OG, NH, VF (Image)

1924-25, definitive issue, worker 5r dark blue and gray brown, perforation 13½, horizontal strip of seven, two complete perfins ''Obrazets'', horizontal invalidating perforation, full OG, NH, VF (Image)

1925, definitive issue, 1k-5r, complete set of 22, including both 10k stamps, 2r with perforation 14½x15, printed on watermarked Borders and Rosettes paper, horizontal gutter blocks of four except 2k and 18k, the last one is slightly faded, fresh condition otherwise, full OG, NH, mostly VF (Image)

1925, definitive issue, soldier 18k violet, printed on watermarked Borders and Rosettes paper, the ''key'' value of the set, top left corner sheet margin block of four, full OG, NH, VF (Image)

1926, definitive issue, 1k-5r, imperforated complete set of 20, printed on watermarked paper, corner sheet margin blocks of four, slight usual gum waves, fresh quality unit, full OG, NH, VF (Image)

1925, 20th Anniversary of the Revolution of 1905, imperforated and perforated complete sets of three, mostly marginal blocks of four, imperforated blocks are expertly regummed, perforated 3k and 14k with perforation L12½, 7k - comb 12x12½, one stamp has tiny natural inclusion, full OG, NH, fresh quality overall, VF appearance (Image)

1925, 20th Anniversary of the Revolution of 1905, 3k-14k, perforated complete set of three used on registered cover in Moscow, appropriate postmarks and arrival ds on reverse, VF (Image)

1926, definitive issue, 7k-5r, imperforated complete set of eight on improved white wove paper, blocks of four, perfect condition, full OG, NH, VF (Image)

1926, definitive issue on improved paper, complete set of five imperforated trial color proofs of worker 8k in blue, yellow, carmine, magenta and green, printed on white chalk-surfaced paper, nice margins, full OG with minor waves, NH, VF (Image)

1926, Esperanto Congress, 7k blue green and red, 14k blue green and violet, complete set of two, unfolded sheet margin blocks of four, 14k has top margin and labels (gutter) at right (vertical fold along the gutter), full OG, NH, VF (Image)

1926, registered cover sent from Esperanto Congress in Leningrad to Voronezh (address written in Esperanto), franked by complete set of two, tied by Congress ''10.8.26'' special date stamp, Voronezh arrival ''19.8.26'' marking, VF and rare (Image)

1927, black or red surcharge 8k on soldier 7k brown and commemorative stamps, complete set of nine, full OG, NH, VF (Image)

1927, red or black surcharges 8k on commemorative stamps, complete set of six, mostly marginal blocks of four, No.355 has comb perforation and folded along horizontal perforation, some usual gum waves without creasing, full OG, NH, VF (Image)

1927-30, red or black surcharges 8k on commemorative stamps and Industrialization, two complete sets of six and four respectively, full OG, NH, mostly VF (Image)

1927-29, 2nd definitive issue, 1k-80k, complete set of 15, blocks of four, five blocks with sheet margins, 5k slightly folded along horizontal perforation, post office fresh condition otherwise, full OG, NH, VF (Image)

1929, 3rd definitive issue, peasant 80k red brown on yellow network, horizontal gutter pair, vertical fold along the gutter, still fresh quality, full OG, NH, VF and rare positional piece (Image)

1929-30, Industrialization, 5k-28k, complete set of four, blocks of four, all are unfolded, except 20k - is slightly folded along horizontal perforation, full OG, NH, VF (Image)

1932-33, Maxim Gorky, 15k brown and 35k blue, complete set of two in top right corner margin blocks of four, and imperforated block of 15k, some usual gum waves, perforated 35k with vertical gum crease affecting two stamps, in general fresh condition, full OG, NH, VF appearance (Image)

1933, Karl Marx, 3k-35k, complete set of three, unfolded blocks of four, 10k horizontal position of watermark, 35k with bottom sheet margin, post office fresh quality, full OG, NH, VF (Image)

1933, Leningrad Philatelic Exhibition, red surcharges 30k on 15k brown black and 70k on 35k ultra, complete set of two, first one with bottom margin, post office fresh quality, full OG, NH, VF (Image)

1933, Leningrad Philatelic Exhibition, red surcharge 30k on 15k brown black, vertical pair, top stamp without a dot variety of surcharge. full OG with a few toned spots, NH, VF appearance (Image)

1933, cover posted to the mail on Leningrad Philatelic Exhibition, franked by four values of 15th Anniversary of the Revolution, tied by red Exhibition ''20.3.33'' date stamp, fresh and VF (Image)

1933, Ethnographic issue, 1k-35k, complete set of 21, premium centering and very fresh, full OG, NH, VF, Paradise Valley Stamp guarantee stated that this set was a part of the Perfectum Collection offered in their Auctions in 2017-18 (Image)

1933, Baku Commissars, 4k-40k, complete set of five, nice and fresh, full original typically uneven gum, NH, VF, C.v. $440 (Image)