Old guitar, Salvador Ibanez (Spanish)

Hi

Salvador Ibanez is as I understand a well known old Spanish brand, by the way..Eric Clapton also played/collected some of this guitars.

I was lucky to pick this up for a 20 dollar. As always its intresting to know details about manufacuturing year and other things. So if somebody has some information I be thankfull.

The frets I could nap out almost by my fingers, so it needs new frets. Looks like the bridge has been replaced or re-glued to..
But other than that its in good+ shape for its age. Very curious to listen to the sound of it... after replacing the frets.

So if somebody could share some information about value, my Guess is
800$, but the sound of it would probably have more value than money infront of the stoven late night.
What I should do or not do..with it I be more than happy to hear?

Guitar was found in Norway.