Antique miniature cast iron Spark potbelly stove Grey Iron Casting co Mt. Description – An excellent example of an. Antique miniature cast iron Spark potbelly stove. The stove was manufactured by the Grey Iron Casting co Mt. Joy PA and is marked in the lower. The stove comes with 2 tools one original to lift the top and the other a small flue tool which I’m not sure is original but can with the stove. These stoves are often described as salesman’s samples, but I believe they were actually toys or novelties as salesman samples were. Miniatures of full size stoves. This one is really nice and would be really hard to upgrade. Dimensions – 13 5/8 ” tall x 8 3/4 ” deep x 8 wide. Age – ca 1900 – 1940 +. Condition – Fine condition (see pics). Listing and template services provided by inkFrog.