Due to the close ties between China and Brunei, the first type of coins used in Brunei were Chinese coins. This was initially called ‘Pitis’. They were later known as ‘Kue’ when local ‘Pitis’ were introduced. The local ‘Pitis’ coins had ‘Sultanate of Brunei’ stamped in front of the coin and the royal umbrella was imprinted at the back. These were issued from the 16th to the 19th century. Previous Islamic coins were also called the ‘Pitis’. Another type of coin that was used in Brunei were ‘Duit besi’ (which roughly translates to ‘Iron money’). Iron was considered valuable those days that it was used as money. 100 one-square inch pieces were valued at 1 dollar.