Here we have the raw billet of stainless steel, which is roughly 25mm thick (or 1 inch).
A very rough, and only temporary marking of where the bezel area will be parted off.
Since the billet is sawed off, both faces are not square to the sides, and if machined as such would not allow to repeatedly hold and get perpendicular surfaces on the lathe.
So the billet is turned flat on both surfaces in respects to it's sides. Here you can see how off one of the faces is.
Further turning the face flat, it is a rather slow process as the unevenness creates a hammer effect on the tool bit as it cuts. Thus cuts need to be light.
Almost finished with the surface.
One face is turned flat.
Getting the sides square to the face.
The billet was turned around, and the procedure repeated.
A billet with perpendicular surfaces.
Marked off where the slab of billet will be cut off for the dial.
Making a center hole, to open a temporary interior opening.
Boring the interior of the dial space.
After opening the interior to 30mm, I proceed to turn down the outside of the ring to 45mm.
This creates a lot of dangerous swarf, it is dangerous as it must be continuously removed, if not it can catch in the spindle and potentially be thrown at one's face or body.
The billet ready for the bezel ring to be parted off.