That is a very interesting guitar. At first, I thought fake. But the wear on the bigsby like trem looks old. Plus why fake a "one of" ? What you may have is a "one of" custom made guitar made by Gibson for the guy who's name is engraved on the neck. At one time, many country music stars did this. I am not sure this is a marriage of a Gibson neck to a Gretsch body. But I agree it has some of the appearances of a Gretsch body. When Chet Atkins hooked up with Gibson in the 80's, they did make some Chet Atkins models that had a more Gretsch look to them. This isn't one of those however. I believe it is truly an individual, custom made guitar. If Gibson did not make it, then a very good luthier did. You might consider contacting Gibson to see if they have any records of it.