I'm certainly not an expert on the Hess family, but that is an interesting rifle. The stock was chosen not only for its beauty, but for strength as well.
While plain, it is neatly made in all aspects and seems to have been made as a percussion rifle. Not sure what the marks or "dimples" are around the lock--is it possible to get a closer photo?
It appears to be a nice quality "workingman's" gun and it's good to see one in such fine condition. Thanks for the opportunity to view it. Dan