I had a real nice working Turf King in my collection. The Bally horse race themed one ball games like Turf King were made in the late 1940's. I liked playing it and if I had the space for it, I would have keep it.
In 1951 Bally started manufacturing Bingo pinball machines and use almost all the parts internally from the one ball horse race games. I sold mine for $350 and it played perfect and look great too. Very nice looker and cool player.