I was first drawn to the flowers on it. But after picking it up and looking at it, I figured it out. I have never seen one of these, nor knew they made them. I think it's from the 50's or 60's. It was .99¢.
It's for a Fly Swatter. You hang it on the wall and slip the swatter in and "Voila" you have a place to put your fly killer.