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 Monetary System makers at least since the Second World War. Two primary factors account for this: The European Monetary System was no longer a functional arrangement in May 1998 as the member countries fixed their mutual exchange rates when participating in the euro. Its successor however, the ERM-II, was launched on 1 January 1999. In ERM-II the ECU basket was discarded and the new single currency euro has become an anchor for the other currencies participating in the ERM-II. Participation in the ERM-II is voluntary and the fluctuation bands remain the same as in the original ERM, i.e. +15 percent, once again