I haven't done any research on mine either, but being from Rockford, I have to wonder if it was made by Elgin. Mine was advertised as being a Free Westinghouse, but there's nothing on mine (or yours that I see) to indicate Westinghouse.
I admit the 10.00 price plus the fact that I loved the peacock decals was what sold me on mine lol! I'm kinda taking my machines one at a time to try and research and restore, so when I get to this one I'll be sure to share anything I can find.