That rifle is older than my area of any kind of knowledge.
The rifle is a civilian rifle, I can tell you that much- a muzzle loader, either caplock or originally flintlock later converted to caplock- I can't tell from the pics.
Often, patchboxes in the stock, which yours has, is an indicator that it was a quality firearm at the time it was made.
That's about all I can tell you, sorry.
