Brunei Sultanate 1 Dollar 1970 Proof Cannon 5,000 minted. Shipped with USPS First Class. Brunei is a sultanate on the northwest coast of the Island of Borneo. Proof copper-nickel crown, with the sultan on the obverse, and a cannon on the reverse. The coin comes in its case of issue (the lining of the case does have a few old rust spots).