I am guessing it's a Singer model 319.
Here is a website that will help you identify your
machine.
http://www.sandman-collectibles.com/...machines.htm#8
Whatever she is, she's a beauty. I have a real soft spot
for old Singer machines.
Enjoy!
Lori (makakehau)
P.S.
After you identify her, you can get a FREE manual from Singer:
http://www.singerco.com/accessories/manuals.html