Estonian kroon 4 days after the founding of the Estonian SSR, the last Estonian pre-WW II coin, the new 1 sent (date 1939), was issued. In 1927, before the kroon was officially introduced, 100 marka banknotes circulated with an "ÜKS KROON" (1 kroon) overprint. Eesti Pank introduced 10 krooni notes in 1928, followed by 5 and 50 krooni in 1929, 20 krooni in 1932 and 100 krooni in 1935. The kroon was reintroduced as Estonia's currency on 20 June 1992, replacing the Soviet ruble at a rate of 1 kroon = 10 rubles. (Each person was able to change a maximum of
European Unit of Account European Unit of Account The European Unit of Account (EUA) was a unit of account used in the European Communities from 1975 to 1979, when it was replaced at parity by the European Currency Unit, in turn replaced at parity in 1999 by the euro. Initially it was used for Lomé Convention and European Investment Bank operations before being gradually introduced into other sectors of Community activity. The EUA was a basket of European currencies, originally designed to have the same value in mid-1974 as the IMF special drawing rights basket, both worth US$1.20635; they immediately moved apart in value.