1951, Mongolian Emblem and Flag, 1r multicolored, blue color is strongly shifted to the bottom, top sheet margin block of 12 (2x6), a common block from the same sheet positions is included, stamps on position 14 (second stamp at the second row) of both blocks with broken outer frame at left, full OG, NH, VF, Est. $400-$500 (Image)

1951, Russian Scientists, Pavel N. Yablochkov, 40k brown black, raster horizontal diamonds, full OG, NH, VF, Est. $150-$200 (Image)

1948-56, eight commemorative stamps, including Victor Vastnetsov and Nikolay Gogol in complete sets, used in 1956 on registered air mail cover from Moscow to Switzerland, all appropriate markings and arrival ds, VF, Est. $150-$200 (Image)

1954, Valery Chkalov, Aviation Pioneer, 1r gray, violet blue and dark brown, comb perforation 12 1/2x12 instead of L12 1/2, top sheet margin block of four, full OG, NH, VF, Est. $150-$200 (Image)

1954, Sports issue, Track, 40k multicolored, double impression of black color, unfolded block of four, full OG, NH, VF, Est. $400-$500 (Image)