Looking at this artwork, you will notice a blue outline. It comes from a UK magazine called Private Eye, which focuses on news and current affairs.
Audrey Amiss really liked using her sketchbooks; she would draw, tear out the page, and display it as art.
However, this one is different, as it has artwork on both sides of the paper, so you can see both sides.
Normally, a picture frame has an image between the glass and a backboard, so you would not be able to see anything from the back. Amiss chose to remove the backboard so that both sides of the artwork are visible.
If you want to see the other side, you can walk around the wall.