 An inscription in the name of Vasishka in pure Sanskrit in Middle Brahmi script, with his full imperial titles "Mahārājasya rājātirājāsya devaputrasya Shāhe Vvāsishkasya" ("Of the Great King, the King of kings, His Majesty, Shahi Vasishka") was found in Isapur (), near the city of Mathura, on the shaft of a ""Yupa"", a sacrificial Brahmanical pillar, now in the Mathura Museum.The coinage of Vasishka becames smaller than his predecessors, being minted on increasingly small flans, and the metal quality becoming debased.The deities appearing on the reverse of his coinage are similar to those in the coins of Huvishka and Vasudeva I.