Old Sideshow/Peepshow Original Painting

This old and what I think is a Sideshow/Peepshow original Painting is approximately 5 feet high by 3 feet wide. Its painted on a solid board type material with a canvas like surface and framed in very rough wood. (I can't find any signatures on it) I had this given to me by someone who found this painting in the garbage in Toronto, Ontario, Canada back in the mid 1970's and took a liking to it. I have kept it ever since. I sent a picture of it to the CNE (Canadian National Exhibition) archives to have it researched. They thought it was too risque for the CNE, and thought it could have been used in some of the smaller traveling shows back in the day or from the shows traveling the United States. If anyone could give me any information about its age, possible artist or history I would appreciate it.