Well as sluckey said, not sure we got enough evidence to say for sure or to call the Grand Jury.
To me the face plate on amp up for action looks authentic based on what I can see and that is still viable. The Fender Logo looks authentic and in the right position. Right under the Fender Logo there should of been "Solid State Series" based on the other examples of different amps in that series like the "Twin Reverb". Someone installed that big green pilot light that probably could have removed the "Solid State Series" in the process.
The knobs have been changed to classic fender type knobs and that wasn't original and can be seen on the Twin Reverb example. You can see the old numbers from the previous setting locations. To me this confirms an original face plate.
From what I see in the Solid State Series, they didn't have a middle control, just vol/treb/bass. I don't see where there was any more holes for previous control knobs have been covered up or plugged. Another plus for original face plate.
This is my opinion, might be wrong but from what I see, think like mresistor regarding a prototype that was never put into full production but don't think it's a fake
Edit: One thing that confuses me is almost all of the Solid
State Series had a "Style Knob" but with only three knob
locations, it most certainly would have to be vol/treb/bass.
No style knob on this one!?!