These are unused soda can bottoms that were intended to be used as
seen in the pics below.
If you didn't like your soda in bottles you could still participate in the
contest using cans!
Below is a rusty example of what these cans looked like, as well as a peek
inside at the image visible there.
That's Don McDougall (The Guess Who) on one side and Ritchie Henman on the
That's APRIL WINE's Jim Clench on the bottom - inside the
You'll just have to trust me on this.