This is just about the darndest machine I've ever seen! The handwheel and treadle foot plate look very Singer, the thread holder is very Wheeler & Wilson, I've never seen a bobbin winder like that, I'm pretty sure the lever above the bobbin winder is the stitch length regulator and I've never seen one like that on a domestic model, never seen a presser foot lifter like that...
There where literally hundreds of sewing machine makers in the early days of sewing machines. Some made only one or a few machines. This could be one of them.
I'm looking forward to how she cleans up!