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
Indexed unit of account Indexed unit of account When a daily indexed unit of account or Daily Consumer Price Index (Daily CPI) or monetized daily indexed unit of account is used in contracts or in the Capital Maintenance in Units of Constant Purchasing Power accounting model, deferred payments and constant real value non-monetary items are indexed to the general price level in terms of a Daily Index such that changes in the inflation rate—in the case of monetary items—and the stable measuring unit assumption—in the case of constant real value non-monetary items—have no effect on the real value of these items. Non-indexed units, such