A very unique Gibson Custom Shop ES-330 stoptail prototype. 330's are full hollow with P90's, so one with a stoptail mounted directly to the top with no center block to reinforce it is quite amazing (vs a stock trapeze tailpiece). Here I'm chasing down the nut as it may have set up for slide for the previous owner (or the preference was to just leave it high).
Note I was told that this guitar was originally built for Nashville studio legend Brett Mason.