Authorized reproduction of the users / instruction manuals for the Singer sewing machine, model 9W7 and its attachments. This is a rotary hook, round bobbin, sewing machine with reversible feed and will most likely be found in a treadle base. It is for family use and is the Singer version of the Wheeler and Wilson model 9. Notice the squared post which is characteristic of this machine. Check the bobbins in the illustrations of these two manuals to see the primary difference in them.