Hello all. This may have been asked before but I have not found it. Lets say I wanted to buy a solid gold GMT II Rolex ( I truly do) . I know it's 18k gold. What is the actually weight of all of the gold on the watch excluding the weight of the dial and movement? Since 24k gold is at such a high value it stands to be that a solid gold Rolex should be worth it's weight in gold. With that in mind how much is 18k gold vs/ 24k gold per ounce??