Hopefully Lancaster or Kuduae will see this & tell you definitively.
As to the mounts that certainly will be a challenge, then to find a scope worthy to go on it, see what our European guys can find for you - you might be lucky!
I'm on guessing here but the circle could have been a emblem for a family member or a presentation rifle, you do say its accurate!
Agree whole heartedly with Bwanabob - If only it could talk!
And yes she's a keeper alright!