Hi kiko. Thank you very much for your input. Your information is very intriguing. Did you notice that the Bigsby vibrato on the guitar has the Gibson logo on it? It is very faint and looks like it could have been sand casted from an original Gibson Vibrato but I am not sure of its origin. I took it off to see if there were any other mounting holes on this guitar and there were not. All holes appear to be original except for a couple of very small holes that are just a bit higher from the actual holes on the vibrato. Looks like they moved it back just a tad for mounting. Another strange this I find on this guitar (yes they keep coming) is the neck pocket. It looks like there was some work done there that was not original. Maybe it is a repair. I don't know but I can definitely tell that the paint and finish are different but like the guitar is very old. Also, I am willing to state that this guitar could very well be from the 1960's instead of the 70's. I am familiar with other guitars of that age and the condition of the pots, solders and interior cavity of the wiring appear to be quite old. Also the three way switch on this guitar is very different than any I have ever seen. You can see it in the pics above. Last, no one has commented on the belly kerf on the back of the guitar. The only manufacturer I can find that used a belly kerf on a SG style guitar was Gibson Kallamazoo on the Model KG-2. Now I know that these guitars were press molded bodies of MDF so I recognize that my guitar is not one of those. But why the belly kerf and why on this guitar at this age? Slab bodies on SG's are the norm. Someone offer a suggestion please. I am open.