I'll try to add pictures of the bare body as it is today and as it was originally too. Here are pictures of the original wiring, which I don't have. Has anyone ever seen a Casino or ES-330 with this configuration? Can anyone point me to another model with such a setup? Does anyone have a wiring diagram showing this on any Gibson or Epiphone guitar? The only thing I can think of is the fifth knob on a Rickenbacker 325 or maybe a Gretsch configuration? Dunno! I don't know if the extra pot is a tone or volume, and I don't know why it would be on this guitar. I tried searching the nets but have not found a wiring diagram for the Casino Coupe. There are too many red wires and I don't remember where they go.

I am 99.9% sure the extra pot (same correct codes) and hole in the horn (perfectly clean and like the others in the body) are factory OEM, but I have several of these guitars and have never seen anything like this. Hello Folks, I managed to break off 2 red wires from the neck volume pot.

It has an extra pot on the treble horn, in addition to the normal neck and bridge volumes and tones, three way switch and jack. I have a 1967 Epiphone Casino that has an electronics configuration I have never seen before.

Epiphone casino wiring diagram