Hi Phyllis,
Your serial number is on the front slide plate and will be a 7 digit number. Sure would be neat to see Bill of Sales. Set screw needs to be loosened to remove tension assembly and also one on stitch length but I've never had this knob off.
Jon
Edit: Just saw the warranty pictures. Extremely interesting!
Last edited by jlhmnj; 07-07-2012 at 08:57 PM.