Collections and Large Lots. SOUVENIR SHEETS - NICE GROUP: 1937-62, 25 items, starting with Pushkin, Congress of Architects and Aviation Exhibition of 1937, including Stalin on cream and white paper, perf Lenin Mausoleum (CTO), North Pole surcharged sheet of 1962 and many others, occasional flaws possible, F/VF, Est. $400-$500 (Image)

Collections and Large Lots. PERFORATION ERRORS: 1937-48, 10 fantails (imperforate at margin side), two 50k Ukraine is a former horizontal pair, including Dzerzhinsky 10k and 20k, Sanatorium, Zhukovsky and Air Fighter imperforated at right, ''Rear to Front'' imperf at left and several others, unused with full OG (2), CTO or postally used (3), F/VF, Est. $600-$800 (Image)

Collections and Large Lots. GROUP OF PRINTING ERRORS: 1946-56, six items, including a spot over CCCP on Medal of 60k, 25th Anniversary of stamps - 15k with short ''P'' in ''CCCP'' and 60k with broken ''O'' and third ''C'' in ''POCHTA CCCP'', Arms of1947 with joined ''CC'' in ''CCCP'' in pair and etc., nice and fresh, full OG, NH or LH (1), VF, Est. $150-$200 (Image)

Collections and Large Lots. SELECTION OF MAINLY PERFORATION VARIETIES: 1955-58, Moscow University 40k, Youth Festival 40k, Trade Union Congress 40k and Crimea Observatory 40k, all with perforation L12½, in addition both types of M. Aivazov, full OG, NH, VF and guaranteed genuine, Est. $150-$200 (Image)

Collections and Large Lots. THREE VARIETIES OF DEFINITIVE STAMPS: 1960-66, miner 15k black, size 14x21mm, re-issue in top left corner sheet margin strip of three with control numbers on top selvage, Arms of 1961 4k red, vertical pair printed from damaged plates, resulting in strongly overinked denomination and Flag, Arms of 1966 4k red, a single with double impression, all with full OG, NH, VF, Est. $100-$150 (Image)

Collections and Large Lots. VALUABLE POSTAL HISTORY GROUP OF: 15 items 1924-56, representing early Flights Moscow-Koenigsberg-Berlin- Paris, Vladivostok-Shanghai franked by first air post issue, Special Delivery cover to Hamburg franked by 12 stamps, Perekop imperforated set on cover to Netherlands, other nicely franked items, in addition Belgium Balloon Flight cover of 1932, minor flaws mentioned, still F/VF, Est. $400-$500 (Image)