1 Pitis - Sultan Abdul Momin

Abdul Momin was the longest-reigning sultan in Bruneian history, ruling from 1852 until his death in 1906, yet his reign coincided with a steady erosion of territory — including the cession of Sarawak to James Brooke and the eventual acceptance of British Resident control. The pitis, a small tin cash coin rooted in a centuries-old Southeast Asian monetary tradition, was among the last indigenous issues before British influence reshaped the sultanate's commercial infrastructure entirely.

Tin was the obvious local choice: Brunei's riverine trade networks had moved the metal for generations before coinage formalized it.