100 Dollars - Hassanal Bolkiah Brunei Currency Board

The 1987 Brunei gold issues were produced to mark the 20th anniversary of Hassanal Bolkiah's accession to the throne, following his sultanate's transition from a British protectorate arrangement toward full independence — Brunei having only formally severed its protected status with the United Kingdom in 1984. The Currency Board, rather than a central bank, remained the issuing authority precisely because Brunei has long resisted establishing a conventional banking institution aligned with Islamic finance principles while still maintaining currency interchangeability with Singapore and Brunei dollars at par.

Mintages for this series were tightly controlled, and the pieces were not intended for circulation.