Respectfully think it's from a kit using those commonly-seen parts. The barrel should be fine as long as it's cleaned properly. I agree with Woodnbow.With all respect to those who think otherwise, this looks to me exactly like a gun hand-made in some American's home shop. In recent decades, using widely available parts. It is not European.
Personally I would hang it on the wall, but not shoot it.
But then, I am picky about the soundness of any gun I shoot.
For shooting I'd suggest Traditions or Pedersoli, about $300 - $1300 at www.midwayusa.com. A tad hard to find on their site.