Yes I have seen one as a friend of mine used to collect them.
He decided after many years to get rid of them and had a problem getting the price he wanted.
They are fascinating however I would not like to have to rely on them -they make a lovely showpiece in a house.
My grandparents had something similar to this when I was little, but with more ornate features. They kept it in the special room with all their fancy furniture that was only for special ocassions an it was connected and serviceable, but they had another one in the kitchen for regular use, so I guess it was more of a showpiece than anything.