Muhammad bin Tughluq was the Sultan of Delhi from 1325 to 1351. In 1330, after his failed expedition to Deogiri, he issued token currency, that is coins of brass and copper were minted whose value was equal to that of gold and silver coins. Use of token coins can be successful when the government alone makes them and takes people into confidence, but Tughlaq failed to check counterfeiting of currrency.