24/10/2018: 50 Ngultrum commemorative banknote issued
A special commemorative banknote of 50 Ngultrum was issued to celebrate the 50th Birth Anniversary of His Majesty Jigme Khesar Namgyel Wangchuck.
28/10/2013: 1000 Ngultrum banknote issued
A new denomination of 1000 Ngultrum banknote was introduced, reflecting the growing economy and need for larger denomination currency.
09/06/2011: Second series of Ngultrum banknotes issued
The second series of Bhutanese Ngultrum banknotes were issued, featuring improved security features and updated designs representing Bhutan's unique culture.
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.
21/11/2006: Introduction of polymer banknotes
Polymer banknotes were introduced in Bhutan, replacing the older paper banknotes, to enhance durability and security of the currency.
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.
04/03/1992: First series of Ngultrum banknotes issued
The first series of Bhutanese Ngultrum banknotes were issued in denominations of 1, 5, 10, 20, 50, and 100 Ngultrum, showcasing Bhutanese culture and landmarks.
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.
31/12/1975: Establishment of the Royal Monetary Authority of Bhutan
The Royal Monetary Authority of Bhutan was established as the central bank of Bhutan, responsible for managing the Ngultrum currency.
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.
31/05/1974: Introduction of the Bhutanese Ngultrum
The Bhutanese Ngultrum was introduced as the official currency of Bhutan to replace the Indian Rupee.
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.