I am not a sewing machine expert either, but I think it would have sentimental value having been your grandmothers, passed on to your mother and now to you. I did check out e_Bay and noticed that the majority of the machines listed were White Rotary's, a Florence Rotary and a New Leader Rotary, whereas your machine is an Elgin Rotary with the Elgin manufacturing label on it that the others did not have. I think you could probably research some more to see what you can come up with. Good luck.