Antique 1850's French marble mantle clock.

This is a clock I would like to know more about. I got it at a flea market about a year ago because it had nice, good quality features like an enamel dial, a brass rim...It is very nice. I know that it is French, as the movement has similar features to other clocks, like a large wheel on the plate visible when you open the back and striking on a bell. As for the case, it has two nice tones of marble, which are in perfect, flawless condition, like the clock, that is complete apart from the pendulum missing, but I do have a substitute. Thanks!