I'm 100% certain this clock is no older than 10 years at the most, please look for these pointers when assessing a carriage clock, look at the screws used in the construction of this clock they are a mixture of finishes they are dull and lifeless and almost black in colour there has been no attempt to polish the screw heads and uniformly blue them, another give away is the click spring with a dull black finish, a brass click, on a genuine clock and in particular French clocks this is always steel not brass, the end of the mainspring barrel arbour is poorly finished these where always highly polished, the movement plates have a rough brushed finish these where always highly polished  in fact many of the parts that should be highly polished have a brushed finish such as the mainspring barrel, the word "Hands" is engraved very roughly, on a french clock these are actually stamped these where done by home workers and all the carriage clock manufactures would send their plates out to these workers who would stamp any required script onto the plates then send them back to the factory's, carriage clock production was very much a well organised cottage industry in the 19th century with many home workers making individual parts and supplying manufactures, things such a wheels and pinions where supplied by these workers.

It's a Lemon

I don't know why any respectable antiques dealer would pass off a clock such as this as the genuine article and risk their reputation, they should know better.