I have service records of the 2 times it was serviced by Rolex, in 1987 and 1998. Both services were handled via an AD. I have a copy of the Rolex invoice to the AD for the first service (as well as the AD invoice to me). Also have the parts that Rolex returned when it was serviced. In 1987, that included the crystal, crown, crown stem, O ring, and bezel insert. These, of course, were the orignal parts that came on the watch since that was my first service.
In 1998, they returned only the bezel and an O ring, even though they replaced many others, including the bracelet. In both cases, the watch was returned with the exact same type of parts it went in with. They made no changes to the watch's build.
Again, I very much appreciate all the comments and welcome more.