Thanks to the forum for identifying this well worn 1956 J-160e
This was a major mess, I wanted to get it in playing order to give to my brother for his birthday, but not put more into it than it was worth. I took it to a local respected luthier, he felt it needed a new bridge and neck work (high spot at the 15th fret, indicative of slight neck lifting) and it wasn't worth doing all of it. And he was concerned if he just did the bridge I wouldn't be happy. I was willing to pay for the bridge work, but he declined. So, faced with a wall ornament, I decided to give it a shot myself. Never touched a guitar repair, but have done high quality auto restorations.
The good news is I did it all including fixing the belly bulge, replacing the bridge, saddle and nut, installing an eBay Epiphone EJ160e pickup set and knobs with new period correct aged Klusen tuners and Pyramid flat wounds for less than $200. I was able to work around the neck issue with slightly higher action (0.125" at 12th fret). Sounds great and I love the knocked about look.
Here are the parts, minus the Blisstone bone nut, saddle and pins off Amazon, which I tea stained to age. The electronics and tuners were off eBay and particularly good finds. The tuners were realistically aged by the seller and the style is virtually identical for 1956.
I was able to knock the belly bulge down substantially. I created a jig similar to a Bridge Doctor and used the existing adjustable bridge holes to clamp through. Dampened the bridge area and ladder braces, put the jigs and guitar in the sun until the metal registered close to 150F, guitar with neck covered just at 100F. Clamped it up and waited two days.
The existing bridge was off in string length by more than 1/2 inch (!), the saddle was a disaster and the strings were not centered on the fretboard. The bridge pins holes were a mess.
I filled all the holes and the adjustable bridge slot for top stability and added a string ground with fuse for safety. I used the bridge slot to locate the new bridge, the string lengths agreed closely with the StewMac fret calculator.
The period correct aged tuners look much better than the 70s era Ibanez tuners.
Overall a fun project and I was able to revive a guitar older than I am to be playable again. Looking forward to giving it to my brother in a few weeks.