The earliest CKXL Top 40 chart I had was from the spring of 1967. It was mimeographed (purple print) on a blank 8 1/2" x 11" sheet of paper.
At the top where a logo would be printed on a piece of letterhead was a small black, yellow and green sticker with something like "CKXL 11-40, The Talk Back Station" and a phone
or handset on it. The first printed Double Your Pleasure survey I saw or had was from December 67 or January 68.
Those who danced were thought to be quite insane by those who couldn't hear the music.