This is technically a repair shop (Mullet’s Repair Shop in northern Indiana) but they make a popular stove used by Amish. The reader who sent these photos in notes that Mullet’s Repair “are the makers of the Mullet Coal Stove which is without a doubt the most commonly used stove in the community.”
The Mullet Coal Stove brochure:
Inside you’ll find technical and safety info. The stove burns “Nut and Coal size Anthracite coal”.