I have an old water heater from the Coleman Lamp and Stove Co. of Witcha , Kansas. Know one seems to know how old it is. Its a Model No.463. Its is about two feet tall made of cast iron. It has a cast iron door. A spiral of rather large cooper tubing inside of the door. It has a small pipe and a valve for letting in fuel on one side and hinges on the other side. It is probably about 7 or 8 inches in diameter with a base a little larger. We have had many old plumbers and contracters in and know one has ever seen one of these. If you need a picture or any further information let me know.