Electronic Foot Controller vintage You can see the difference

You can see the difference in design of the original Pinking Attachment screw versus a normal thumb screw in one of the photographs above - you do not want to use a regular thumbscrew because it is not long enough to support the attachment properly

1 1/16" straight and 1 1/16" keyhole

power cord back

but the illustration references are not only enjoyable to look at

Electronic Foot Controller vintage You can see the differenceVintage Style Electronic Foot Controller A foot controller as reliable and delightful as your Featherweight! This foot controller (sometimes called a foot pedal) is the complete unit for the Singer Featherweight 221, and 301just plug it in and begin sewing! No extra cord is required. Here's how the Electronic Foot Controller will sew magic into your quilting life: Stays Cool Under Pressure: Even during those just one more block late night quilting