WTWR

Detroit, Michigan's WTWR "Tower 92" started out as an Adult Top-40/Oldies station in the late 1970s.  By 1981 they had become a full-fledged CHR station but this format lasted a mere 15 months before they switched to Country.  The tower in their name referred to General Motor's newly-built Renaissance Center where the WTWR's studios were located.  92.3 FM is currently Urban Oldies/Adult Contemporary WMXD "Mix 92.3"

The back of the sticker dates it to 1980.  (Click it bigger.)  I'd love to wear one of those "Tower 92" belt buckles and t-shirts while drinking my 39-cent Big Gulp.  Somebody wrote "WCXI-FM" at the top--these were the call letters after WTWR flipped to Country in 1982.