Muhammad-bin-Tughlaq issued a token currency in copper coins between AD 1329 and 1330. This means that he introduced a new form of currency that was made out of copper. In this context, a token currency refers to coins that do not have an intrinsic value equal to their face value. Instead, they are used as a representation or symbol of a certain value. Muhammad-bin-Tughlaq`s decision to introduce token currency was a significant and controversial move during his reign as the Sultan of Delhi. The purpose of issuing copper coins as token currency was to stabilize the economy and control inflation. Although this move was well-intentioned, it ultimately led to economic instability and was met with resistance from the people. Overall, Muhammad-bin-Tughlaq`s decision to introduce token currency was a notable event in the history of medieval India.