I have a rifle like that from the same time period, the craftsmanship is "different" to say the least but it has a Bill Large barrel, a Roller lock and will shoot through the same hole at 50 yards no matter what you feed into it. This rifle has put a pile of deer in the freezer for me.
The barrel on your rifle looks pristine, if I were you I would I would head to the range, see what it likes and shoot the devil out of it. It's value is in it's parts and how much enjoyment you get out of using it, the latter being the most important.
The folk here know their rifles and see everything that could have been done differently during it's build. Anybody else will think you have a work of art because they don't know the difference.