Syd is correct in his earlier post, JD only had one F-612, serial number OD 101, guitar has been on displaying various locations in Denver where you can get within 2' of it and clearly see the label and the details (odd fact that according to the Guild serial number chart on their website, serial number OD 101 belongs to an A350 model from 1969).
Guitar was redone by Arturo Valdez at his shop across from the Hollywood Guitar Center on Sunset Blvd. Work included new top and fingerboard, new checkerboard binding on top, peg head and side of fingerboard (for some reason the decision was made to place the checkerboard on the outside layer of binding). Pearl inlays were installed on the fingerboard and bridge, saddle was compensated in three sections. Unfortunately the Valdez shop has closed but you can still find stories about the shop and Arturo online. I still have the shop brochure from when I was there years ago that clearly describes the work done to John's F-612.
I also believe that the guitar from the early records and videos is an F-412 Special with a flat back.