This is a beautiful French cast brass striking mantel clock, in the Louis XV style, topped with a classical covered urn, lavishly embellished throughout with foliate scrolling in a rococo revival style typical of the Belle Epoque period, which is when this clock dates to, circa last quarter 1800s.
The movement is stamped on the back:
"ANC'NE M'ON FRANJUS RAISON & THOMAS SUCCESSEURS" or
Ancienne Maison Franjus Raison & Thomas Successeur,
"The ancient House of Franjus' successors: Raison & Thomas"
Raison & Thomas were a well known Parisian clock manufacturer.
On the clock face it says: "Jules Josset" and below "Gisors". This would have been the retailer for which the clock was originally made. Gisors is a French town about 85 kilometers northwest of Paris.
As for value, if you were to see your clock for sale in an antique store, say, it would have a full retail value of $5500. This is also the replacement value for insurance purposes.
Expect to get 30% - 40% of this if you were to sell at good antique auction house.
I do hope this helps!