<P><b><center><font color=blue><font size=5>PRINTED USER INSTRUCTION</center></font></font><P>Authorized reproduction of the users / instruction manual for a Singer Slant O Matic, model 503 and 503A, a round bobbin, automatic zig zag sewing machine with many of its basic attachments. This manual has basic sewing information, how to use the built in buttonholer, as well as, detailed information on its cam based decorative stitches. It also has cleaning and oiling information and some troubleshooting information. This machine is referred to by Singer as special and if your machine has the model designation 503A on it, this is the manual that you need. The A simply indicates that your machine was made in Anderson, SC, USA.