This model of Singer Sewing Machine Instruction book can be downloaded here. It is for older type machines that have a side loading bobbin, where by the bobbin is inserted into the bobbin case then the case in inserted into the machine to the left of the needle. Usually the machine model numbers this book covers are 15K and 15N types. Also many other older Jones sewing machines. Instructions for your Singer Sewing Machine. Diagrams of threading and Bobbin winding and useful tips are included..