Unknown maker Estimate c. 1920's

As far as I know this is a one-of-a-kind machine. I have two theories about it. The first is that it is homemade. Someone may have made this for their child out of spare parts in the garage or made it to sell gum in their mom and pop store. The second is that it is a prototype that never made it to production. In any case it is a really crude machine with a lot of attention to the mechanism. I have a hard time believing that someone put that much time and effort into a child's toy but I have no evidence that it was made for any company either. The mechanism works and looks a lot like an Advance model D.