1951, Stockholm Peace Conference, 40k and 1r, complete set in unfolded bottom right corner sheet margin blocks of four, full OG, NH, VF (Image)

1951, Russian Scientists, 40k in various colors, complete set of 16, original printings, unfolded blocks of four, full OG, NH, VF (Image)

1951, Aleksandr Butlerov, 40k orange red on bluish paper, raster horizontal diamonds, re-issue of 1956, full OG, NH, VF and scarce (Image)

1951, Pavel Yablochkov, 40k brownish black, raster horizontal diamonds, unfolded block of four from the re- issue of 1956, full OG, NH, VF (Image)

1951, Russian Composers, 40k gray and 40k brown on pinkish paper, two unfolded blocks of four, full OG, NH, VF (Image)

1951, Victor Vasnetsov, 40k and 1r, two complete sets in unfolded sheet margin blocks of four, original printing and re-issue of 1956, full OG, NH, VF (Image)

1951, Victor Vasnetsov, 40k dark blue, brown and buff, bottom right corner sheet margin single, imperforated at the bottom, CTO with full OG, VF (Image)

1951, Czechoslovak Republic, 20k-1r, complete set of five in unfolded blocks of four, 20k and 1r with sheet margins, 40k has very slight gum disturbance at the bottom, full OG, NH, VF (Image)

1951, Volkhov Power Station, 40k and 1r, yellow color omitted on each stamp, bottom left corner sheet margin blocks of four, full OG, NH, VF and beautiful set of matched blocks, N. Mandrovski certificate for each block (Image)

1951, Volkhov Power Station, 40k dark blue, gray and yellow, bottom left corner sheet margin block of four, each stamp with yellow color strongly shifted to the top, full OG, NH, VF (Image)