One Rupee Silver Coins are very rare to find. Here is one example of rare 1906 Silver Coin. This 11.66 gram silver coin contain 91.7 % pure silver. These coins are minted from Bombay Cary Mint mark "B" and Calcutta bearing no mint mark. This coin is available on eBay and Olx for sale. Aproximate rate for one good condition coin is Rs. 1500.00.