I've moved your question to a new thread. Wait around and I'm sure someone will know the answer! Speedy
It's a good luck medallion claiming to be silver bullion. The color doesn't impress me, so I would suggest doing a specific gravity test, or taking it to a jeweler and having it weighed and measured to verify its content.
its a symbolic coin often used for religious purposes or offerings during festivities like diwali. On the obv is Goddess Laxmi and God Ganesh.
There's one being offered in an auction here http://newdelhi.olx.in/rare-bombay-999-prize-coin-iid-12573642 for eight million dollars US. It's true value might be one millionth of that amount. Oh, and welcome to the forum.