Is it tall enough for you to put your knees under? If so, it may be some sort of a desk. It looks presentable on both sides, so its meant to be able to stand away from a wall, and be easily moved around the room. The foldout table feature suggests some sort of workstation purpose. Something you can pull out when you need to use it, and put it back into its place when you don't. This would be good for someone who didn't have a lot of space. I could be way off the mark here. It may have a much more specific use, but I can't imagine what. As far as its age, I would guess around 1900 to 1920's myself, just a guess.