This CD 254 looks as though it had supported a pretty beefy cable. Instead of the normal light cable rub typically seen in the saddle area, this one shows an "image" of the actual cable. I have received many comments on this photo, and the consensus opinion is that this is the result of a heavy cable load swaying, moving, or vibrating against the glass, possibly aided in the frictional grinding process by grit picked up on the conductor. Two other views from lower angles relative to the saddle can be found here [id=425487028] and here [id=425487185]