The original foot to my Singer Featherweight 221 was the "button type". I am used to Berninas and their clam-shell style and HATED the button foot. I ordered the newer, clam-shell type Singer pedal on line and was able to wire it into the machine cords myself. It is much more comfortable for me and it wasn't very expensive at all. Before you order a replacement, be sure it is compatible with your specific machine. Also, if your machine has potential antique value, hang on to the original foot pedal. Upgrading to newer, more efficient parts, usually decreases its resale worth.