The first method you should use is the nitric acid test. This test is simple to do, and is absolutely accurate as well. First, you will need to brew a small cut in your watch. Is identical have as being a host big incision, or stop in an obvious spot, but you do need produce small cut somewhere at first glance of your watch. Next, you will want to get some protective gloves on, and find out some nitric acid. Finally, you should just place a drop of nitric acid on the cut you made in your watch. Generally if the acid turns green, your own watch's gold might be fake. However, if there isn't a reaction, your watch may perhaps be real older. You don't need to know the chemistry for why this works, just keep in mind that when I only say that this will.