Congrats on your "new to you Centermark Fusil de Chasse, I have been fortunate enough to own two of them, I got my first one about 25 years ago, it's in Walnut and in great shape, shot allot but well cared for, my second one came to me about four years ago, it's stocked in dark curly maple, the original owner ordered it special from Centermark in the early '90's, he hadn't shot it in years because of poor health and decided to sell it, it wasn't cheap, but well worth the price, once I got it home and cleaned the years of dust and cigar smoke off of it it was much nicer than I had expected.
I'm sure you're going to like it once you get accustomed to it, I've had a couple of dozen rock scratchers over the years, still own a half a dozen customs and the Centermark Fusil de Chasse is my favorite.
One thing you should know about those Fusils is that the solder that Centermark used back then wasn't the same as makers use today, over time that old stuff deteriorates and the barrel will separate from the blocks that hold the barrel pins in place, I've had both of mine resoldered with the newer type solder and they are fine.
The smith that did mine is Ed Parry (Black Hart Period Arms) from CT., he used some kind of heat sink paste on the barrel to keep from messing up the original finish.
If yours hasn't been done you might want to consider having a period gun smith take a look at it to check out the solder, or if it's not lose, keep a eye out for it, it's not a big deal to fix and it can't hurt the gun, but if one of more of the solders break it'll need to be taken apart and resoldered.