Collection 50/6: Metallic Currency of India: Exchange of the Sovereigns and gold bullion between Australia and India, proposed as a temporary alteration to the re-opening of the Bombay mint.
Collection 50/3: Metallic Currency of India: Establishment of a gold mint at Bombay for the coinage of the British Sovereign as a temporary measure during the war.
Collection 50/4: Metallic Currency of India: Introduction of the 15 Rupees gold coin in 1918 during a period of shortage of metallic currency and pending the coinage of the British Sovereign in India.