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
Karsten Kroon top ten of Tirreno–Adriatico and the Tour of Flanders. He helped Fränk Schleck win the Amstel Gold Race by disrupting the chase when Schleck attacked; Kroon finished fourth. Kroon finally finished on the podium, in La Flèche Wallonne, third in front of Schleck. He also came second in the 2009 Amstel Gold Race, just behind Serguei Ivanov. In 2010, Kroon joined , but returned to for the 2012 season. On 24 April 2018, it was reported that Kroon had confessed to doping for "a short period during my career". He added: "I was a professional cyclist in a very difficult