This should probably be in
https://www.quiltingboard.com/vintag...thusiasts-f22/
From what I can see, it looks like it may be a Davis machine, but I couldn't find one similar on needlebar.org. I didn't notice a stitch length regulator. I'm basing my guess on the rectangular needle plate and it appears that the belt guide is on the outside of the balance wheel. There is a recent thread about a Minnesota machine that looks quite a bit like yours.
Minnesota Sewing Machine
Janey - Neat people never make the exciting discoveries I do.