Howdy. I have a guitar that looks like the maple neck version of the guitar John Mayall is holding on the cover of his 1968 record Diary of a Band. I'm curious if anyone out there knows much about the history of the guitar on the record? This one looks like the same thing and has his initials on the neck heel. Upon inpection it looks to have originally have been a six in line Fender headstock style guitar that was reworked. I read that he likes to cut down the bodies on his guitars. I contacted his assistant and sent him a pic but she said he doesn't recognize it. They said perhaps he only had it for a short time or might not remember it being it was over 50 years ago.