do u have a serial number for that guitar?
I can tell you that it looks like a 1961 Les Paul Sg custom. The pick guard and the inlays back this up...but the trem doesnt as far as I know.
I think the guitar looks original, except for the truss rod cover.(and maybe the trem)


Have a look to make sure that the headstock hasnt been cracked in the past...or replaced, because usually there is a large dimond shaped inlay on custom Gibsons.(maybe this one has one as well, I cant see properly...Looks like a nice guitar. The inlays suggest that it is a custom...but check it out!