It depends. If the machine in the treadle cabinet takes side-clamping attachments, especially if it is a Singer, then one should be able to use a walking foot with it, though I don't think the feed dogs will line up. I have never seen a walking foot that attached any other way, and most of the old treadles use top- or back-clamping feet. The one domestic treadle sewing machine that has a built-in walking foot--actually a needle-feed--system is the Davis Vertical Feed. It went out of production in 1916, but is still coveted by many for quilting and binding.