Your Wagner is gorgeous, what a great piece!
I recently bought one from that era, completely covered in rust and the "WAGNER" was barely visible. It had severe pitting damage on the bottom, the cook surface looked okay and the price was $5. E-tank and lye-bath removed the rust and crud but revealed a crack on the side running to cook surface.
Knew I was taking a chance but the price was worth the effort. It will make a cool display and discussion piece.