Estonian kroon until the Soviet invasion in 1940 and Estonia's subsequent incorporation into the Soviet Union when it was replaced by the Soviet ruble. After Estonia regained its independence, the kroon was reintroduced in 1992. The kroon became the currency of Estonia on 1 September 1928 after having been a unit of account since 1924. It replaced the mark at a rate of 100 mark = 1 kroon. The kroon was subdivided into 100 sent. In 1924, the kroon was pegged to the Swedish krona at par, with a gold standard of 2480 kroon = 1 kilogram of pure gold. The standard
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