When did WLS start using WONDERFUL WLS? They also were called "The Rock of Chicago" and "Musicradio" and for a brief time "More Music" (1969). What else were they noted as?
When they began playing R&R were they called "Wonderful"?
That was early on as a Top 40 in the first set of Kerr jingles. They were later "The Station with Personality," "ABC Owned in Chicago," "The Big 89," "The Rock of Chicago," "Musicradio," "The Only One" (I believe after WCFL gave up the ghost, even if MET was on FM and WEFM was coming), "Chicago's Favorite," "The Rock of Chicago" again and "AM 89."
Their slogan before the format change was their owner (who was acquired by ABC)--"The Prairie Farmer Station."