Now that's a cool coin, awesome! Found this on wiki... I do believe it's silber.
"Regal issues, 1862–1947
In 1862, coins were introduced which are referred to as Regal issues. They bore the portrait of Queen Victoria and the designation "India". Denominations were 1⁄12 anna, ½ pice, ¼ and ½ anna (all in copper), 2 annas, ¼, ½ and 1 rupee (silver) and 5 and 10 rupees and 1 mohur (gold). The gold denominations ceased production in 1891 while no ½ anna coins were issued dated later than 1877.
In 1906, bronze replaced copper for the lowest three denominations and in 1907, a cupro-nickel 1 anna was introduced. In 1918 and 1919, cupro-nickel 2, 4 and 8 annas were introduced, although the 4 and 8 annas coins were only issued until 1921 and did not replace their silver equivalents. Also in 1918, the Bombay mint struck gold sovereigns and 15 rupee coins identical in size to the sovereigns as an emergency measure due to the First World War.
In the early 1940s, several changes were implemented. The 1⁄12 anna and ½ pice ceased production, the ¼ anna was changed to a bronze, holed coin, cupro-nickel and nickel-brass ½ anna coins were introduced, nickel-brass was used to produce some 1 and 2 annas coins, and the composition of the silver coins was reduced from 91.7% to 80%. The last of the regal issues were cupro-nickel ¼, ½ and 1 rupee pieces minted in 1946 and 1947."
