100 Ringgit

The Brunei Currency and Monetary Board has maintained a Currency Interchangeability Agreement with Singapore since 1967, meaning Brunei notes — including this denomination — are accepted at par in Singapore and vice versa. That agreement survived Brunei's departure from the Malaysian currency union and remains in force today, giving this note a practical cross-border utility almost unique among Southeast Asian issues.

Thomas De La Rue's involvement with Brunei currency dates back decades, and the relationship has been consistent enough that the printing standards across the series are unusually uniform. The 1996 date places this note within the long-running Sultan series that preceded the polymer transition for lower denominations.