This is a late 1960's RCA RLC645 Pecan Radio that has been rebuilt into a guitar amplifier. An Isolation Transformer has been included to isolate the guitar player from the 120VAC that power the amplifier.
I made a video of this amp using a Les Paul guitar, and it demonstrates how it handles a pedal (Ibanez JD9 Jet Driver), but I couldn't upload it. It sounds really good, and with a pedal as a preamp, it sounds great.