depends realy on the watch, I had a lady,s dress watch that was around the 8 grams of 18ct gold and had a men's dress watch that was about 6 grams. the best way to know is remove the movement and the glass and weigh. or if you are not in the position to do that open de back and weigh the case back then you will see if they use a lot of gold or it is a thin layer. (like those cheap chronograph Swiss watches 18ct)