This listing is for the Genuine Singer Sewing Machine Hardware shown. These pieces include the Simanco brand and parts number.
This is a knee lever from a Simanco sewing machine cabinet. The bracket mounts under the sewing machine cabinet and holds the foot pedal from your sewing machine. The lever mounts in such a way as to depress the button on the foot pedal but controlled by your knee rather than your foot.
This is a great vintage part, and is hard to find. Perfect for sewers who would rather control the speed of your machine with your knee. My mother insisted on one of these devices when me and my siblings were small because it was off the floor and hidden from small children.