There is a very similar design on page 4 of Hide Glue – Historical & Practical Applications with a couple of changes. I found the yellow brass bowl [it was a compote, with a soldered on foot, which I removed]. I had given it to Brian Westover, the Blacksmith at This is The Place Heritage Park, a few years ago and after I recently reminded of him of our trade, he brought this by yesterday.
The legs are made of real wrought iron and riveted to the bowl. Filled with hardwood charcoal and heated up it will provide sufficient heat for the hot hide glue pot. And for heating up my coffee cup, or burn in knife for hot shellac stick repair, see Shellac, Linseed Oil, & Paint-Traditional 19th Century Woodwork Finishes.