Not always true. My '70 Washington State Patrol car had a vinyl roof on it when I purchased it approx 12 years ago. Although I later found the build sheet in which it did not have one. But of the five police antennas, four were on the roof on top of the vinyl roof. One of the comments I heard was possibly done for a Supervisor or for the next owner (Police Dept) Also the trim appeared factory as does the pictures of this car. It had the rivet shaped fasteners on top of the metal to accept the moulding clips.