Welcome Heather (That's my ladies name as well!)
Check this site out for some info.
http://www.sandman-collectibles.com/...r-machines.htm
(shortcut to answer is here -
http://www.sandman-collectibles.com/...achines.htm#15 (NO the link # does not mean it is a Singer 15))
Link to the manual from singers Modern site -
http://www.singerco.com/uploads/down..._127-128-3.pdf
Link to the ISMACS copy of the older version -
http://www.ismacs.net/singer_sewing_...e-manuals.html
you want the 127 & 128 manual