I have a bunch of papers that I got off a guy who did amazign research for me about two years ago. These papers are one of a kind since it is done in my friend's writing. To comfirm this he gave me the books that they came from and it match up. The book it comes from is a book about guitars. It tells who played the type of guitar and if the artist had more than guitar model. Example: It shows that Elvis had two J-200 guitars. Well, It does this. The original is listed as J-200 but the second one is listed as J-200-II meaning that this is a completely different guitar than the original but it is the same model.
Ok, for J-45 it doesn't list a second or more copies of it so it means he only had one guitar of this model. It tells only a handful of the shows that he used this guitar for. It also listed what movies this guitar was in if the artist was in a movie. Which we all know that Elvis was a movie star. It says that the guitar was redone sometime between 1967 to 1968. Reasons: unknown.
That is what I am going by here. The info is from a book call Guitars and their artists.