01/01/2022: Removal of monarchy symbol
Brunei currency no longer featured the portrait of the Sultan as part of efforts to modernize the banknotes.
21/07/2017: Commencement of New Series Polymer Banknotes
New series of polymer banknotes with modern designs entered circulation.
05/05/2013: Upgrade of polymer banknotes
Introduction of new polymer banknotes with enhanced security features.
01/07/2011: Introduction of Brunei-Indonesia Currency Agreement
Brunei dollar became interchangeable with Indonesian rupiah in specified regions.
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.
29/07/2003: Introduction of new leone notes
Sierra Leone introduces a new series of leone banknotes with enhanced security features to combat counterfeiting.
18/03/1996: Change in currency regime
Brunei dollar became fully backed by foreign exchange reserves instead of gold.
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.
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.
12/06/1973: Establishment of Brunei Currency Board
Currency Board assumed responsibility for the issuance and management of Brunei dollar.
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.
27/07/1967: Introduction of Brunei and Singapore Currency Interchangeability Agreement
Brunei and Singapore dollars became interchangeable at par.
27/04/1961: Independence of Sierra Leone
Sierra Leone gains independence from the United Kingdom, introducing the Sierra Leonean leone as its official currency.