1981 Gibson GGC-700 with prototype stamp. Tuners, bridge, tune-o-matic and electronics including pickguard are not correct, but body is mahogany, maple set neck with ebony fretboard. I'm trying to figure out what happened on the front of the headstock. The black laminated plate is on and blank, but I can read "Gibson" backwards, as if it had a mother pearl inlay and was glued upside down.