After seeing the photo, it reminded me of one I have tucked away in the basement closet, I took a look and it's the same model! RO29!
Why is this rare? I do not have the aluminum pans that are shown in the second picture, just the large inner pan. What is the best way to use these? I seem to recall being told there should be water in the base, for more even heat, and have done that on rare occasions, but the outer pan does not look like it should be used that way.