For parts and restoration purposes.  There are some differences between the two, one is missing a front knob from the front, see photo of 3 front chrome knobs and one is not there. They screw on. The other one has what looks likeba light bulb type screw end out the bottom and the other does not. I have no idea what these go to or how they work, they have labels on underside, not sure age, have not attempted to clean or polish in any way. They measure 10.25 inches across. Selling as untested, not working for parts may be missing other parts dirty and vintage so signs of wear and use are always present on items  such as scratches dents worn paint old price stickers and such