Looking at the floral design of your napkin ring, and the stacked monogram, I estimate it to date no earlier than late 19thC or early 20thC. Unfortunately, the picture of the mark is too blurred to say much about the maker, and you don’t show the Minerva mark, so no saying if the object was made in Paris.
You could try the French Ministry of Culture’s website for Paris makers registered after 1878. A provincial maker will be harder to identify.http://www2.culture.gouv.fr/public/mist ... 4%24%2534P
Good luck in your research!