I believe that this gun has indeed undergone a major "upgrade".
The stock is new. I have never seen a real piece of French walnut with that figure. The wood looks Turkish to me. I am not even sure that the grain at the head is remotely reasonable.
The engraving is highly suspect as well. At the very least, it has been polished.
However, I don't think that "la manu" ever did a low grade Ideal "anglais". And ditto for the (reversed) sideclips. So I think that this was at some point a high grade ideal (or maybe part of one).
As for the swivels, I have a 7RE/C that has them and I am 100% confident that they are originals. The "bretelle automatique" is OK if you don't need to use it for a long period of time. It has to be narrow by necessity, hence it is not confortable.
Many customizations were possible on those high grade Ideal.
WC-
