Steven M

I have this coin that was given to my mother in 1961 by the Queen mother, I was just wondering if anyone knows anything about it? The front simply says Elizabeth - Queen Mother The back says "Lickey Grange School, Opened By H.M Queen Elizabeth, The Queen Mother, November 2nd 1961" Its a large coin weighing around 70grams. Pictures can be found here : http://cz-solutions.co.uk/coin/ if anyone knows anything, it would be greatly appreciated