Are you sure it's Sears?
A vintage Singer featherweight has a little sewing table to the left of the needle that is hinged, so you can flip it up for the machine to fit in its carrying case. The only other vintage Singer featherweight made is more rare, more expensive, and has a table that slides onto the machine from the left (instead of the hinged table). If it's not one of these, I'm not sure why the machine is being called a featherweight.