With the new serial number information I would guess that the number etched into the tailpiece is a PA drivers license number.
An ES-125 should have a sticker with a serial number inside the body that you can see through one of the F holes. If it isn't there, sometimes there was also a rubber stamp like number. Anything like that.
The cover on the P-90 pickup looks to be late 50's. The gold barrel knobs also look to be 50's. But because the guitar has changed parts (the tuners) these may have been replaced, especially the knobs. Without a clear Gibson serial number it will be very hard to give a specific year but I would say late 50's early 60's based upon your recent information.
An ES-125 should have a sticker with a serial number inside the body that you can see through one of the F holes. If it isn't there, sometimes there was also a rubber stamp like number. Anything like that.
The cover on the P-90 pickup looks to be late 50's. The gold barrel knobs also look to be 50's. But because the guitar has changed parts (the tuners) these may have been replaced, especially the knobs. Without a clear Gibson serial number it will be very hard to give a specific year but I would say late 50's early 60's based upon your recent information.








