The carving on the bentwood cover might hold a clue to who made the machine. I remember seeing another cover here on the board that had carving on it a while back. That's all I can remember about the carving, but I think it was also a tree or something like it. Your machine has pretty decals on it. I hope you can find more about it.
Taking another look at your machine, I noticed the decals on the hand crank too. That's neat!!