Old longrifle

[ar10]

I acquired what I think is a Pennsylvania long rifle last week. The rifle is pretty well worn but I did make out the last for raised letters of manufacturer, "BURGH". The one thing that puzzles me is it has a percussion hammer instead of the flintlock. I can see the slots where the pan and hammer should have been but now there's empty space. Everything I've read about the rifle including the pictures seems to indicate it's from the mid-1700's. (I saw a couple of pictures the Lancaster County museum had on line). If I can verify it's from that period then I'd like to get it restored.
The other item that came with the rifle is the powder horn. I did have that checked out from Ohio Historical Society last week and, according to them it dates circa 1740s~1790's. it has the initial "J W". It also has some black powder in the bottom.
I'd like to find out where I could find a good restorer and someone who might give me an idea on the actual date of manufacture.

 

[GCBurner]

Lots of flintlocks were converted to percussion, when the option came available.

 

[Jim K]

To make even a stab at identification, we will need good pictures, including a closeup of the lock, the stock opposite it on the other side, the patchbox area, the muzzle, and an overall view of both sides.

FWIW, a conversion normally didn't just remove the pan, it usually substituted a drum and nipple in its place, drilling the touchhole out and threading the hole for the drum. Almost always, some kind of filler, usually brass, was used to cover the space where the bottom of the pan was.

While a name might end in "burgh", the word that comes to the mind of this Steelers fan is Pittsburgh, where there were a number of gunsmiths and also a couple of big gunsmith supply houses, like J&D Little.

Jim