The koruna went through a number of reforms. A particularly drastic one was undertaken in 1953. At that time, the Communist Party of Czechoslovakia had to deal with the fact that there was a double market in the country: a fixed market ensuring basic food availability a remnant of the postwar quota system, and a free market, in which goods were as much as eight times more expensive but better quality. They decided to declare a currency reform valid from 1 June 1953 and to distribute new banknotes printed in the Soviet Union. The reform had been prepared very quickly and was confidential up to the last minute, but some information leaked anyway, causing a lot of panic among people.
The night before the deadline, the president of Czechoslovakia Antonín Zápotocký made a radio speech, in which he lied to the nation that there was no possibility of a reform and quieted down the inhabitants. The next day, people (not lucky enough not to fit into the category of "capitalistic elements", a pejorative category to which the intelligence agency used to blacklist certain individuals) were allowed to change up to 1,500 old korunas for new korunas at the rate of 5 old to 1 new koruna and the rest at the rate of 50 to 1. All insurance stock, state obligations and other commercial papers were nullified. The economic situation of many people got worse insofar as many petitions and demonstrations broke out, the largest of which took place in Plzeň, where 472 people were arrested.
In 1993, in accordance with the dissolution of the Czechoslovak federation, the Czechoslovak koruna split into two independent currencies: the Slovak koruna and the Czech koruna. Accession to the EU in 2004 meant both currencies were slotted to be replaced by the euro once their respective countries meet the criteria for economic convergence and there is the political will to do so.