Tmac, are you sure they are friction fit and not rubbed in?
Good question… At this point, I’m not sure of anything. Under magnifications, however, they appear to be pressed-in jewels. Here’s the image I posted in another thread – the jewel on the right appears to be a factory installation (please ignore the red cloud – that’s a bad jewel installation). The ones that I’ve destroyed look the same as the jewel on the right.
If they are rubbed in, how does one get them out without damaging them? Author de Carles has a chapter on rubbing them in, but little information on their removal.