<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 model 421, a round bobbin, convertible, free arm, automatic zig zag sewing machine with many of its attachments. It has basic information and a stitch diagram for its decorative stitching cams. There is also has oiling and a little bit of maintenance information.