1957, Vissarion Belinsky, 40k dark violet, yellow, brown and black, left sheet margin single with perforation L12 1/2 instead of comb 12 1/2x12, a beautiful example, full OG, NH, VF (Image)

1957, Gray Partridge, 10k multicolored, green color omitted, full OG, NH, VF, a common stamp is added for comparison (Image)

1957, Vologda Lace Maker, 40k multicolored, perforation L12 1/2 instead of comb 12x12 1/2, top sheet margin unfolded block of four, full OG, NH, VF (Image)

1957, Youth Festival, 20k multicolored, bottom sheet corner margin imperforated block of four, lower right stamp with ''molosezhi'' variety, full OG, NH, VF (Image)

1957, 40th Anniversary of the October Revolution, three stamps of 40k commemorating 250th Anniversary of St. Petersburg (Leningrad) in proof souvenir sheet, printed on thick paper without lilac color (silhouettes of Leningrad), size 149x105mm, no gum as produced, NH, VF (Image)

1957, 40th Anniversary of the October Revolution, three stamps in changed colors of 40k commemorating 250th Anniversary of St. Petersburg (Leningrad) in proof souvenir sheet, printed on thick paper, size 149x104mm, no gum as produced, NH, VF and scarce (Image)

1957, 40th Anniversary of the October Revolution, two proof souvenir sheets of three stamps with red or black Moscow special postmarks, printed on thick paper without gum, mostly VF (Image)

1957, International Youth Games, Wrestling, 25k bright green and lilac, right sheet margin single imperforated on the right, full OG, NH, VF (Image)

1957, International Philatelic Exhibition in Moscow, 40k bright greenish blue, perforation L12 1/2 instead of comb 12x12 1/2, right sheet margin unfolded block of four, full OG, NH, VF and difficult perforation error in genuine state (Image)

1957, Launching of the First Sputnik, 40k indigo on light blue paper, bottom sheet margin single imperforated at the bottom, full OG NH, VF (Image)

1957, All-Union Industrial Exhibition, Tractor ''DET 250'', unissued design and denomination of 1r in bluish green, perforation L12 1/2 partially separated by scissors, gummed, VF and extremely rare, in various Russian Specialized Cats these stamps without perforation and mounted on cards are considered to be proofs (Image)

1957, All-Union Industrial Exhibition, Tractor ''DET 250'', unissued design and denomination of 1r in bright ultramarine, perforation L12 1/2, full OG, NH, VF and extremely rare (Image)

1957, Falling of the Sikhote-Alin Meteor, 40k multicolored, comb perforation 12 1/2x12 instead of double line perforation 12 1/2, top sheet margin unfolded block of four, full OG, NH, VF (Image)

1957, Launching of the First Sputnik, black overprint on Tsiolkovsky stamp of 40k dark blue and brown, top right corner margin vertical pair, both stamps with partially omitted first letters of the overprint, full OG, NH, VF and very scarce (Image)

1957, Maria Yermolova, 40k brown and violet, bottom right corner sheet margin single imperforated on the right, full OG, NH, VF (Image)

1957, Maria Yermolova, 40k brown and violet, missing white text ''M. N. Yermolova'' at right, full OG, NH, VF and rare variety (Image)

1958, All-Union Industrial Exhibition, 60k gray violet, black and red, top right corner sheet margin imperforated block of four, printed on thick chalk-surfaced paper, no gum as produced, NH, VF and rare multiple (Image)

1958, All-Union Industrial Exhibition, reduced format perforated (L12 1/2) proof of 60k in brown, gummed, VF and extremely rare, some Russian Specialized Cats listed the same design proofs affixed over Goznakpresentation cards, according to our records this perforated proof offered to the public in the first time (Image)

1958, All-Union Industrial Exhibition, reduced format perforated (L12 1/2) proof of 60k in deep blue, gummed, VF and extremely rare (Image)

1958, Peter Tchaikovsky, Portrait and Scene of the Swan Lake, two plate proofs of 40k in gray blue, bottom left corner margin imperforated pairs, printed on thick chalky paper, no gum as issued, NH, VF and very rare (Image)

1958, Peter Tchaikovsky, Scene of the Swan Lake and Portrait, two multicolored imperforated plate proofs of 40k, in bottom sheet margin se-tenant block of six (2x1+2x2), printed on thick chalky paper, horizontal fold is affecting two proofs on the left, no gum as issued, NH, VF and very rare (Image)

1958, Maxim Gorky, 40k multicolored, perforation L12 1/2 instead of comb 12 1/2x12, horizontal pair, left stamp with small plate variety, full OG, NH, VF (Image)

1958, 13th Congress of the Young Communists League, 40k violet on pinkish paper, right sheet margin example imperforated on the right, full OG, LH, VF (Image)

1958, 13th Congress of the Young Communists League, 60k red on creamy paper, comb perforation 12 1/2x12 instead of L12 1/2, horizontal pair, full OG, NH, VF (Image)

1958, 200th Anniversary of the Academy of Arts, blue overprint over Lenin 40k multicolored, left sheet margin unfolded block of four, top left stamp with ''2'' over ''o'' of ''Khudozhestv'', while bottom left has ''2'' over''do'' in overprint variety, full OG, NH, VF (Image)