Detroit Stove Works Jewel 2652 gravity hot air furnace salesman's sample with case. We are estimating that it is early 20th century. It is in cast metal (does not attract a magnet). The case in black fiberboard. Height 11-1/2".

See photos, there are some pieces detached as shown and we are not certain if all parts are present . There appears to be a small part broken and wired on at the foot lever at the lower left as shown.