Most visitors online was 4107 , on 14 Jan 2023
We need a close view of the movement to tell you much but from what I can see I date this to about 1850 based on the layout and the 800 refers to the case material as 80% silver
The new pictures help some.
The watch is Swiss and it has a cylinder escapement. This is common in lower end ladies watches. This is a very modest watch based on a very common movement type. In its day is was reliable and maintainable with a very well set up repair system, now long gone.