
thurmownator said:Very nice find.
A little background ...."The compulsion of the Second World War led to experiments in coinage where the standard rupee was replaced by the "Quaternary Silver Alloy". The Quaternary Silver coins were issued from 1940. In 1947 these were replaced by pure Nickel coins."
Thus, your 1942 rupee is .500 fine (the "Quaternary Silver Alloy"); as it was .917 fine before 1940....and it weighs 11.66 grams.
Again, kudos.