BELARUSIAN 50 RUBLE from 1992

The Belarusian ruble (Belarusian: рубель ) is the official currency of Belarus. As a result of the breakup of the supply chain in the former Soviet enterprises, goods started to be bought and sold in the market, often requiring cash settlement. The Belarusian unit of the USSR State Bank had neither the capacity nor the licence to print Soviet banknotes, so the government decided to introduce its own national currency to ease the cash situation. 

From the collapse of the Soviet Union until May 1992, the Soviet ruble circulated in Belarus alongside the Belarusian ruble. New Russian banknotes also circulated in Belarus, but they were replaced by notes issued by the National Bank of the Republic of Belarusin May 1992.^[2] The first post-Soviet Belarusian ruble was assigned the ISO code BYB and replaced the Soviet currency at the rate of 1 Belarusian ruble = 10 Soviet rubles. It took about two years before the ruble became the official currency of the country.