I had to researched a little and found this:
1992 Soviet rubles
After the collapse of the Soviet Union. New banknotes were implemented using the old 1991 model even after the collapse. These are stamped with a denomination symbol and all languages of the former union were removed except Russian language. Even after the USSR ceased to exist, it was still titled as the money of the USSR. These were temporary issues as already in the same year, new notes were implemented. After the Monetary Reform of 1993, these notes were out of circulation and were free to exchange with the new 1993 issues.
Consudering all countries but Russia used the Soviet Ruble until 1992, I guess these banknotes curculated there?
Both the Rbls 50 rubles and the Rbls 100 noted are in the Soviet catalogue N#210260 , N#211761 , so the question is now if these are to be moved to the Russia catalogue, or if the banknotes mentioned in first post should be moved to Soviet Union.