A British protectorate from 1888 until 1983, it is currently an independent member of the Commonwealth of Nations.
The portrait of the then Sultan, Omar Ali Saifuddin III (ruled 1950–1967), is depicted on the obverse.
The reverse of these coins, and all subsequent series, was designed by Christopher Ironside OBE.
The coins issued were 1, 5, 10, 20, and 50 sen.[1] Sultan Hassanal Bolkiah acceded to the throne upon the abdication of his father in late 1967.
Brunei became a fully independent member of the Commonwealth of Nations on January 1, 1984.