Pretty rifle; thank you for putting up here. It's always nice to see a good gun. It is a western school gun as has already been pointed out. The 'Ohio style' patchbox and the filed detail on the triggerguard bow pretty much confirm that. Would speculate that this gun dates to the period of 1820 to 1830. Everything looks right with the gun from what I can see.
Lock is nice and frizzen has been resoled. Hammer is a Euro item and could be replaced for a better look. Can't tell from photos if a reconversion has been done or not. Doesn't much matter as so many guns have had that done. Thanks again!
Dick