Well, that is puzzling. Great looking oven.
The concentric rings on the top side of the cover say Wagner, but the two underside drip rings not so much. Are they pointed spikes like Lodge uses? Or indentations like BS&R used? Hard to tell from the photo.
Also, the bail handle looks like the one Favorite used with the one end pointing outward to double as a stop so the handle doesn't swing out of control while pouring... may seem rather clumsy, but it does work well.
Just rambling observations. I assume there are no markings on the bottom of the oven?