I think I've found a new hobby! I love learning about these vintage machines. Thank you all for your comments. I'll try to answer some of them.
I'm not new to sewing. I used to make my own clothes when I was younger. Got into quilts and other projects. Now I'm trying serging to make grandkids clothes.
I haven't started working on this Free-Westinghouse machine yet. I have my mom's treadle Singer 115 (She passed away in 1994). This machine hasn't been sewn on for years before that. It's in pretty good shape, just some scratches on the machine. I've taken apart and oiled the machine. It needs a new belt which I just purchased. The cabinet had some delaminating that I'm researching how to repair. I'm not trying to get it in "new" condition. I kinda like the distressed character. I'll post before/after when I'm done. I think I'll try to sew a table runner with it.
The foot pedal is what what you thought (1945066) and the plug fits my machine.
In the accessories given with the machine, there is a note stating it takes 15-1 needles. There is a pkg of Elna needles witha couple of needles in it.
The underside of the case has a 1/16 in the cast iron. I didn't see any other marking (besides the already mentioned g63 and Type J).
I'm having problems attaching photos. Sorry about that. If I can get it working I'll attch them.