The collapse of the Soviet Union or the dissolution of the USSR was a process that ended with the formal dissolution of the Union of Soviet Socialist Republics on December 26, 1991. The fifteen union republics were divided into fifteen independent states, which were to be united into the Commonwealth of Independent States. The largest and main successor state is the Russian Federation. In addition to the aforementioned successor independent states, many other areas were also created that were ultimately not recognized. in the attachments are stamps with overprints of new states and areas (Krym, Spitsbergen Amuria,Altaj, Abchasia, Jakusk,PMR, Adigey,UFA, Ural, Amur and meny others some printins are reversed, cca 250 stamps , arch, block of 2,4,6,8,10, very interesting material for study all is on the pictures Registered packaging