Need help to ID gun

[shotshooter]

I have a percussion rifle that I picked up in KY. I don't have any history of the gun. Its not in the best shape so some of the markings are hard to read. The lockplate is stamped with what looks to say LEMA possibly LEMAN however its a little smudged do to wear and age. Under that it say what looks like NCTR.PA however the first part of that its warn too. So it may actually say something else. It measures about 46" long and has a bead sight on the muzzle. The trigger guard looks like it has been replaced. And it does'nt have a patchpox at all. Its a rather simple gun. The lock still works but it doesn't have a half lock position. There is only one ram rod thimble. From what i can tell it is a smooth bore. But the inside of the barrel is rusted so i could be wrong. pic here http://s77.photobucket.com/albums/j71/whiteboysparky/

[Curt J]

I believe that it is indeed marked "LEMAN" , and the second part is a contraction of "LANCASTER". It might be a Leman lock on a rifle made by someone else, but I'm inclined to think that it is a Leman rifle.  Henry Leman worked in Lancaster, Pennsylvania, 1834 - 1887.