1918 Fifteen rupees
Throughout the period of India's uniform coinage, a number of 15 rupee coins were struck. While not struck in every year, they were struck from 1862 through to 1891 and bore the denomination ONE MOHUR (equivalent to 15 rupees). The 15 rupee coins struck through the reign of Queen Victoria were generally low mintage coins suggesting that they did not see wide circulation or usage.
In 1918 15 rupee coins were struck again, though this time with the denomination 15 RUPEES, and also having been reduced in size to match the dimensions of the British sovereign. The 1918 15 rupees was struck at the Bombay Mint and 2,110,000 were struck. While a much higher number were struck, it is again unlikely that they saw significant circulation or usage as gold coins had been removed from circulation in most countries during World War I.
A small but unknown number of proofs were struck in the early 1960s when the Bombay Mint began re-striking historical coins using original dies.