This catalog (bilingual: Russian-English) is the first independent comprehensive publication in almost 100 years, describing the local editions (provisionals) of Russia and the republics (1918-1922), and the USSR (1931), as well as the postal correspondence, if they have cataloged provisionals. The catalog describes changes in postal tariffs, as well as seven groups of provisionals. Certain issued stamps are described by the author in full detail showing the differences between genuine and counterfeits. This catalog is intended for a wide range of philatelists of the Big Russia-USSR area.