First introduced by King Sivadeva during his between c. 1098 and 1126 CE., replacing old Lichhavi coinage. In the new system Gold Sivaka, Silver Dam and later Nava-Dam-Sivaka and copper Dam were introduced as a new denomination.
Types
Nepali dam were originally made of 1 g pure silver or copper. The copper variety were discontinued in the Malla dynasty and all decreased in size to 0.04 g. They were reintroduced during the Shah period, but only used in the Hill Region and Terai. Silver dams were preferred by the locals of Kathmandu Valley.