A small portable coal heater used to warm the feet of passengers during cold carriage or early car rides. Mustard yellow and brown carpeting cover the triangular shaped body. The ends of the heater are nickel-plated. One end and the back have adjustable ventilators that can be used to regulate the amount of heat. The other end has a handle for a tray that is inserted into the case to hold the heat source, which was often a brick of carbon or some coal.
The Clark No. 7C Heater was one of the more popular styles of carriage heater sold by the Chicago Flexible Shaft Co. of Chicago, Illinois, a company best known during the early twentieth century for its sheep shearing and horse-trimming machines. The company later became the Sunbeam Corporation. The foot warmer measures 4.25" (h) x 7.5" (w) x 13.5" (l).