[Jeffhs]

That radio could have quite severe chassis damage, if the chassis is covered in mouse urine. How long ago did this happen?

I definitely would not try to plug this set in until you wash the chassis thoroughly, then let it dry a day or two. The tuning capacitor may have been damaged as well if it is already rusting, and I hate to think what may have happened to the IF and audio output transformers after the soaking; the stuff may have soaked into the transformer windings and shorted them on the spot. You could have a major overhaul on your hands if that is the case.

I did not realize that space was at a premium in your Sonora radio--the cabinet looked, to me anyway, plenty big enough for a 5x7 or 8" speaker. However, as another person here recently said, AM radio is anything but high fidelity, so it may not be worth the effort to install a large speaker in the cabinet even if you can find a way to do it. You could put a larger speaker in a separate enclosure, however, and connect it to the audio output of the Sonora receiver via a cable, if you don't mind having an external speaker next to the radio itself.

I second the warning against using any kind of wood restorer on the inlay strips of the Sonora's cabinet; they are probably "photo finish" material that will be damaged or destroyed by water or chemicals. I don't know how difficult it is to find authentic-looking replacements for photo-finish material; however, I would think that in a pinch (and if you aren't super-critical as to authenticity), wood-grain contact paper would work just as well.