1991. Its architect was Minister of Finance Valentin Pavlov, who also became the last prime minister of the Soviet Union. The details included a brief period to exchange old 1961-dated Rbls 50. and Rbls 100 notes for new 1991 notes — for three days from 23 to 25 January (Wednesday to Friday) and with a specific limit of no more than Rbls 1,000 per person—the ability to exchange other notes considered in the special commissions to the end of March 1991. See Monetary reform in the Soviet Union, 1991. Coins In late 1991, a new coinage was issued as direct obligations of the USSR State Bank in denominations of 10 kop and 50 kop, and Rbl 1, Rbls 5, and Rbls 10. The 10 kop coin was struck in brass-plated steel, the 50 kop coin, and Rbl 1 and Rbls 5 coins were in cupro-nickel. The Rbls 10 coin was bimetallic with an aluminium-bronze centre and a cupro-nickel-zinc ring. The series depicts an image of the Kremlin on the obverse rather than the Soviet state emblem. However, this coin series was extremely short-lived as the Soviet Union ceased to exist only months after its release. It did, however, continue to be used in several former Soviet republics including Russia and particularly Tajikistan for a short time after the union had ceased to exist out of necessity. Banknotes New 1991-dated banknotes were all issued as USSR State Bank notes (including the 1-, 3-, and 5 rouble denominations), with nearly identical colours and size for all denominations, but included more colour and heightened security features. The 25 Rbl note was omitted from this series, but still remained legal tender; all 1961 notes apart from the demonetized Rbls 50 and Rbls 100 denominations remained in circulation. An important modification of the design included the removal of the texts in languages of other Soviet republics (i.e. all texts were in Russian only) in the 1992 issues; all 1991 notes (in exception to the 2nd 1991 Rbls 100 banknote) contained all Soviet languages. In this series, Rbl 1. notes were issued on 27 June 1991, Rbls 3 notes on 3 November 1991, Rbls 5. notes on 5 July 1991, Rbls 10 notes on 10 July 1991, Rbls 50 and Rbls 100 notes on 23 January 1991, Rbls 200 notes on 29 October 1991, and Rbls 500 notes on 24 December 1991. Rbls 1,000 notes were