Setu coins were previously attributed to the Setupati Princes of Ramanathapuram in South India.
The obverse of these coins have a human figure flanked by lamps and the reverse has the Nandi (bull) symbol, the legend Sethu in Tamil with a crescent moon above.
In type I (1) is closely aligned with the Chola copper coins of the 13th century although slightly larger in size.
The Tamil Setu replaces the Nāgarī script of Rajaraja I in the cola coins.
In type I (2) the blank is even broader but a recumbent bull appears obverse in a vertical position.