01/07/2013: Exchange rate unification
North Korea unifies the official exchange rate and market rate, resulting in a significant depreciation of the won.
27/04/2010: Adoption of new currency symbol
Sierra Leone adopts a new currency symbol for the leone (Le), representing its cultural heritage and national identity.
30/11/2009: Currency revaluation
North Korean government announces a currency revaluation, replacing the old won notes at a ratio of 1 for 100.
29/07/2003: Introduction of new leone notes
Sierra Leone introduces a new series of leone banknotes with enhanced security features to combat counterfeiting.
01/12/2001: Currency redenomination
North Korean won is redenominated, with the previous notes and coins being replaced by new ones at a ratio of 1 for 1,000.
22/02/1996: Civil war ends
The Sierra Leonean Civil War comes to an end, providing an opportunity for economic stabilization and currency reform.
25/02/1992: Introducing foreign exchange certificates
North Korea introduces foreign exchange certificates to counter hyperinflation and stabilize its economy.
29/04/1980: Coup d'etat
A military coup takes place in Sierra Leone, leading to economic instability and a decline in the value of the leone.
06/12/1979: Second major revaluation
North Korean won undergoes its second major revaluation, with the exchange rate being set at 1 for 10.
15/07/1974: Redenomination of the leone
Sierra Leone redenominates its currency, replacing the old leone with a new leone at a ratio of 1:4.
04/11/1971: Introduction of decimal currency
Sierra Leone adopts a decimal currency system, replacing the pound with the leone as its new official currency.
27/04/1961: Independence of Sierra Leone
Sierra Leone gains independence from the United Kingdom, introducing the Sierra Leonean leone as its official currency.
31/12/1959: First major revaluation
North Korean won undergoes its first major revaluation, with the exchange rate being set at 1 for 100.
06/12/1947: Introduction of North Korean won
North Korean won is introduced as the official currency of North Korea, replacing the Korean yen at par value.