Industrial Singer Treadle Sewing Machine wanted. I was told they are the K model Singer, but am not sure that is accurate. I want one that is in good working order, has a free arm and has a special head on it that has a swivel for the sewing foot and changes directions of the stitching and feed dog movement when you swivel it. They are great for turning corners without having to shift your garment around. I would like more information about these kind of machines also. Please contact me if you know where I can get one. Thank you soooo much!