The coin is a jubilee head shilling, made of sterling silver, but if it is gold in colour, then its almost certainly been gold plated at some time. This date doesn't command very much value as many specimens were put away for the queen's golden jubilee. Also gold plating will detract for a true collector. The only caveat I would place on this is other forum members, who know more than I do, may be aware of specimens of this date struck in gold. None of my sources suggest this, but I am always aware that all sorts of strikings and specimens suddenly turn up on here and somebody may know something I don't. If so, I'm sure they will post any information for you. The weight might help indicate