Thanks everybody for your replies. I'm excited to get it. There are some friends of hers that run an RV park. There was a couple renting one of the trailers there and just moved out and left all of their stuff. That was like a year ago. The owners of the park finally decided they weren't coming back. So they are cleaning out the trailer so that they can rent it again. Now my mom's friends say there is an old Singer there and they are going to bring that to her also.
Thanks for the link to the Vintage Yahoo Group. I'm going to join that and see if I can find out more about this machine.