This Longrifle was almost certainly made by Timothy Vogler. He was born in 1806. In 1819, he started training as a gunsmith with his cousin John Vogler and also trained under his father Christoph.
He built his gunshop in Old Salem in 1831, it is still in operation under Blake Stevenson. I showed Blake the photos of this rifle and he said he was sure it was made by Timothy and that M.E.S.D.A. has a very similiar rifle.
I hope this helps.
Michael