Here's the deal, unless your aunt is either well to do or a professional guitar player that can afford to give guitars away, I wouldn't expect this guitar to be of very good quality to start with, Now the fact you say its old, Was it played on a regular basis or was it stored away in the closet or used for decoration? If I were to guess I'd say your aunt bought an entry level guitar years ago to learn to play on but never really had any success and has now passed it down to you, The reason I say never had any success is due to the fact she gave it to you in the condition its in, as she most likely didn't know it was unplayable, And as you say it has an adjustable Bridge leads me to go with JCR, could be an old Harmony, Kay, or other low end archtop, in which case some of these were pretty bad and almost unplayable when they were new, It may be a lost cause if this is the case, but fret naught as it would make a great room decoration, just not a playable guitar, which is the fate of many of these old guitars of that caliber. Hey I've got a few old Japanese made guitars hanging on the ceiling along with some RC airplanes and such, And yes most of those airplanes have been wrecked and don't fly anymore, but there cool to look at and each one has a story