This is a very rare trile burner portable stove made by John Kerner Jr and Co. out of Baltimore MD. The model is titled "Princess" on the base of the front. All 3 of the knobs move the wicks but the one on the far right takes the wick down unevenly. Structurally it is in good shape despite having been rusted due to use. Most of the rust that is on it is not too serious and can probably be cleaned. I say that this is EXTREMELY RARE due to the facf that I could not find one like it anywhere online and could only find a handful of other items made by the John Kerner Jr Company. For more information please message me.