These are basically revamped Silverside/RTS I coaches. In Detroit, these ran well into the early 1990s. Even in the first half of the 80s, GMC was still manufacturing RTS Fishbowl buses.
I Believe This Was A Video Clip Of WXYZ-TV's Channel 7 Action News' 6 P.M. Update's Report On DDOT Director Unveils The 1st Of New Rehabbed Buses In September 1985.