Radio 24 in Zürich is one of the oldest local radio stations in Switzerland with their roots in pirate radio. Their web site is at http://www.radio24.ch/
We heard Radio 24 in the town of Zürich while driving around. I recall it had a good signal in the town itself, but it faded out quickly once we left the town. An audio clip of what we heard is below. The station sent me the verification letter below for my reception report.
Radio 24 – Zürich – 102.8 MHz – 27 June 1988