This JF4 is one of the first production runs for this model. The serial number actually predates the first known numbers for this model as Guild lost a lot of information in a fire. If you look on Guild's serial number page on their website (here) this JF4 is one number before their first production guitar, a rare find.
The guitar itself has a Jumbo sized body made of solid Mahogany with solid spruce top and has a big warm sound that sits nicely a mix with a healthy low end. In good condition for its age, the frets have very little signs of any wear, plenty of life left in them.
The mahogany back is designed without bracing, with a pronounced arch giving it strength without the need for bracing. The result is a very resonant tone with lots of volume.