The Society's collection of coins is more than 12,000 in number. The coins have been listed but not yet catalogued. The Collection has been photographed by the Institute of Indian Numismatic Studies, Nasik. The nucleus of the collection was formed with a donation of coins from the government and a numismatic collection formerly belonging to Sir William Frere presented by Sir Cowasji Jehangir. The rare coins include a 5th century gold coin of Kumaragupta, a very rare gold mohur of Akbar, and coins issued by Shivaji Maharaj.