1960, 15th Anniversary of the Liberation of North Korea, 40k multicolored, perforation L12 1/2 instead of comb 12 1/2x12, full OG, NH, VF, V. Liapine certificate, Est. $500- $600 (Image)

1960, Iris, perforated proof of 60k multicolored, reduced format stamp, perfect quality, full OG, NH, VF and rare, an issued stamp is enclosed for comparison, Raritan Stamps guarantee, Est. $2,500-$3,000 (Image)

1960, Uzbek National Costumes, 60k multicolored, perforation L12 1/2 instead of comb 11 1/2, nice and fresh, full OG, NH, VF, V. Liapine certificate, Est. $600-$750 (Image)

1961, 40th Anniversary of the State Electrification Plan, 10k black and red orange, perforation L12 1/2 instead of comb 12 1/2x12, nicely centered and post office fresh, full OG, NH, VF, Est. $500-$600 (Image)

1961, Andrei Rublev, Russian Icon Painter, 4k multicolored, perforation L12 1/2 instead of comb 12 1/2x12, nicely centered, full OG, NH, VF, N. Mandrovski certificate, Est. $500-$600 (Image)

1961, 91st Anniversary of the Birth of Vladimir Lenin, 4k carmine, salmon and black, perforation L12 1/2 instead of comb 12x12 1/2, nice and fresh, full OG, NH, VF, Raritan Stamps guarantee, Est. $600-$750 (Image)

1962, 50th Anniversary of Newspaper ''Pravda'', Lenin Sculpture, Soldier and Sailor with background of ''Pravda'', 4k multicolored, bottom sheet margin single with perforation L12 1/2 instead of comb 12x12 1/2, full OG, NH, VF, Raritan Stamps guarantee, Est. $600-$750 (Image)

1962, Alekper Sabir, Azerbaijani Poet and Satirist, 4k buff, black brown and blue, re-called stamp with error top inscription ''Azerbaijanyn'' instead of ''Azerbaijan'', full OG, NH, VF and scarce, N. Mandrovski certificate, Est. $1,500-$2,000 (Image)

1962, Agriculture Worker and Produces, 4k black, light blue and green, perforation L12 1/2 instead of comb 12x12 1/2, perfect quality item, full OG, NH, VF and scarce, N. Mandrovski certificate, Est. $600-$750 (Image)

1962, Soviet Union Chess Championships, 4k orange yellow and black, perforation L12 1/2 instead of comb 12 1/2, perfectly centered with bold colors and intact perforation, full OG, NH, VF and very rare, N. Mandrovski certificate, Est. $1,500-$2,000 (Image)

1966, Moon Exploration by Station Luna 9, 10k x3 black, red and silver, three-side margin horizontal se-tenant strip of three, imperforated on the right, full OG, NH, VF, Est. $250-$300 (Image)