6 catalogs - directories for varieties of stamps from the USSR (defects, fakes) on DVD(Russian and English language) The main content of the catalogs is a variety of postage stamps as a result of various defects in the plates of the printed circuit board. The plate defects include various defects in the details of the plate pattern, wear of the plate, as well as sticking of clots of printing inks. Catalogs also show for illustration, some varieties of stamps as a result of typographical errors (displacement of the stamp, different inks, double printing, missing printing of some colors, paper curl when printing) and perforation errors (offset perforation, skip perforation). All postage stamps are marked with a CFA catalog number, and with a Michel catalog number and given the abbreviated name of the stamp. No specific prices are given, as they differ from prices in different regions. Catalogs contain belonging of postage stamps with varieties to one or another price range: M - from 1 to 50 euros R - from 50 to 200 euros RR - from 200 to 1000 euros RRR – over 1000 euros 1. Postage stamps of the USSR Catalog-reference book of varieties of postage stamps. Mistakes of clichés and stamps 1940–1960 Issue 1 Part I 2011 2. Postage stamps of the USSR Catalog-reference book of varieties of postage stamps. Mistakes of clichés and stamps 1940–1960 Issue 1 Part II 2011 3. Postage stamps of the USSR. Catalog-reference book of varieties of postage stamps. Cliché errors and stamps 1930–1939 Issue 1 2012 4. Postage stamps of the USSR Catalog-reference book of varieties of postage stamps. Mistakes of clichés and stamps 1961–1991 Supplement 2 5. Catalog of counterfeit stamps of the USSR 1940-1991 6. Collection of articles on varieties of some USSR stamps and blocks - only in Russian