01/01/2022: Planned Introduction of New Banknotes
Mauritania plans to introduce a new series of banknotes with modern security features and improved durability to enhance the overall quality and functionality of the currency.
01/07/2020: Replacement of Commemorative Banknote
A new 20,000 MRO commemorative banknote was issued to mark the 60th anniversary of independence, replacing the older version. It showcases significant historical landmarks and figures.
01/10/2018: New Banknotes and Coins
Mauritania introduced a new series of banknotes and coins denominated in Ouguiya, featuring enhanced security features and updated designs to combat counterfeiting.
01/01/2018: Floating of the Ouguiya
The Mauritanian Ouguiya transitioned from a fixed exchange rate regime to a floating exchange rate system. The currency's value is now determined by market forces within a managed float.
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.
01/05/2004: Redenomination of the Ouguiya
The Mauritanian Ouguiya underwent a redenomination, where 1 new MRO was equivalent to 10 old MRO. This measure aimed to simplify transactions and improve economic stability.
29/07/2003: Introduction of new leone notes
Sierra Leone introduces a new series of leone banknotes with enhanced security features to combat counterfeiting.
22/02/1996: Civil war ends
The Sierra Leonean Civil War comes to an end, providing an opportunity for economic stabilization and currency reform.
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.
01/06/1978: Decentralization of Currency Issuance
The Central Bank of Mauritania granted the Banque Centrale de Mauritanie (BCM) the authority to issue and control the Mauritanian Ouguiya, decentralizing currency issuance.
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.
01/11/1973: Introduction of the Mauritanian Ouguiya
The Mauritanian Ouguiya (MRO) was introduced as the official currency of Mauritania, replacing the CFA franc. It was initially pegged to the French franc at a rate of 1 MRO = 5.5 FRF.
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.