The New WPLJ (TM) for Radio 538
Here are the first main cuts Radio 538 in The Netherlands had resung at TM Europe (back then Music & Images), based on the package The New WPLJ. These jingles were the first used on the station, as far as I could find out.
Comments
These jingles have been published a lot. E.g. check out
Here you can hear the very first jingle EVER on Radio 538: