Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
A briquet (Dutch: vuurijzer) is a Medieval silver coin, first introduced by Charles the Bold, Duke of Burgundy in 1474 (2nd Emission – Coinage Act of 27 October 1474). The last briquet was struck under Philip the Handsome (6th Emission – Coinage Act of 16 March 1492). The name briquet refers to the fire steel or flint which was chosen by Philip the Good as a personal emblem. The flint was such a favourite Burgundian symbol that it has been used on many coins struck by the successors of Philip the Good, and was used in the chain of the Order of the Golden Fleece.
A single briquet was introduced with a value of one stuiver, other issues were a double and half briquet.
References
Bert van Beek, Hans Jacobi, Marjan Scharloo (1985): Klinkende Munt, Geschiedenis van het geld in de Lage Landen, Elsevier