Dating your old kenmore sewing machine
The Fair = A machine that has definitely been used, possibly not kept up as well as others.Usual wear and tear for a well used machine, pin scratches, some dings in finish, some rubbing off of decals, but machine should work.
Definitely needs a little TLC and possibly some restoration. Is your machine in comparable condition to the one you are looking at, or is it in worse or better shape?
If you see lots and lots of listings for your type of machine, it probably means that there were many manufactured and there is not a huge demand.
Or, you may have a hard time finding a machine like yours it could mean there aren't a lot out there - in which case you might consider contacting a professional appraiser for help.
If you're in need of a manual, check the ISMACS site for a pretty complete list of downloadable manuals from many brands and models.
If you have a machine that belonged to someone in your family, it may have been handed down through more than one family member.