It should drop immediately. Are you sure its not the staining of the tube you are seeing.   

I have a french four glass clock that has a mercury pendulum, I have noticed that the tubes where placed upside down I have placed them the right way up, how long does it take for the mercury to run to the bottom of the tubes because its not exactly free running stuff, I think it would be pointless trying to regulate the clock until it has is this correct ?

You really cannot skimp on a watch fitting glass tool. You need to have one that you can trust and get the repair done without worrying about is it going to work. The cheap tools will not do a good job, they do not fit properly, and they break, not lined up and will not last long. Buy the best and it will last a lifetime. I had many including the Robur. It is necessary have tool.

From a gumtree seller late yesterday afternoon. Seiko 7t34-7a10 Needs crystal and maybe its gasket too? Alarm set button siezed Chrono start button not working Ultrasonic dip Case rebuild

Members, do you buy these watches? if so where? or are they repairs you have from customers.