The central bank in India is called the Reserve Bank of India. The INR is a managed float, allowing the market to determine the exchange rate. As such, intervention is used only to maintain low volatility in exchange rates.
India was one of the first issuers of coins, circa 6th Century BC, with the first documented coins being called 'punch-marked' coins because of the way they were manufactured. India's coinage designs frequently changed over the next few centuries as various empires rose and fell. By the 12th century a new currency referred to as Tanka was introduced. During the Mughal period, a unified monetary system was established and the silver Rupayya or Rupee was introduced. The states of pre-colonial India minted their coins with a similar design to the silver Rupee with variations depending on their region of origin.