This attachment is called a Blind Stitch Attachment or commonly referred to as a Blind Stitcher
50 thread in the needle and on the bobbin
Includes Instruction booklet for all three quilt edges
If you look closely you will see that the embroidery pattern is of a Singer Featherweight 222
The type III and IV cases often have a leather replica handle
Throat / Needle Plate, Graduated - Singer 221 - SCRATCH-N-DENT (SOLD AS IS) cleaning This attachment is called aSOLD AS IS has a manufacturer scratch or two, here or there. Otherwise, item is new, reproduction Graduated Needle Throat Stitch Plate for the Singer Featherweight 221. Is your throat plate plain with no marking lines? Are you using tape or other make shift guide? Would you like to have something accurately marked? We recommend the reproduction graduated needle throat plate. It is marked 1 4", 3 8", 1 2", 5 8", and 3 4" for quick seam allowance