it happens to every Featherweight eventually
you will see the photo-specific to that extension appear
one of the most unique and ingenious attachment designs ever made by SINGER
At this point there should be a slight pull on the thread to indicate that there is a minimum tension
This is the numbered portion of the indicator that gives you a reference for thread tension
Singer Featherweight 221 Sewing machine, 1935 AD881*** swag-bag-item it happens to every FeatherweightWe are very excited to add this lovely 1935 Featherweight 221 to the site; AD881*** indicates a commission date of March 18th, 1935. Completely serviced, cleaned, polished, electrically inspected, timed, tuned and sampled rest assured, this Featherweight 221 will be ready to sew right out of the case. This machine is fitted with an original 110 volt motor that has been rewound to work at optimum speed and torque, so you can plug it in and begin sewing