This is typical wishful thinking of a person who might have knowledge in other realms of art, but none about violins, as one can experience regularly when being in the violin business. It would be better for your peace of mind to say goodbye to this thoughts as soon as possible.
Like others wrote, with a bit more of experience you could see immediately that this violin has nothing in common with Guarneri but a lot with the often Hopf branded Saxony Dutzendware from the proposed period. Everything like construction method, varnish, scroll shape, neck attachment and a lot of other features doesn’t allow a different attribution. And this reflects only the outside impression of the instrument, without looking at the internal structure, which is just as important.
I can easily imagine a shop where they said “Well, here we have a nice case, a lot of old but worthless violin related artifacts, papers and a cheap violin beyond repair, so let’s put it all together for an auction. It probably will sell better this way than the sum of it sold on its own “.