Revolutionary War Era Copper Still

Revolutionary War era small portable copper still. These stills are still described in the "Collector's Illustrated Encyclopedia of the American Revolution" by G. Neumann and F. Kravic, p. 103: "apparently the mash was added and slung on the back of, or carried, in a wagon where the motion during the day hastened its fermentation. In the evening the stopper was removed and wooden plug with a hole inserted. A copper coil was then entered into the hole and the whole unit placed in a fire. As the distillation began, a cup would catch the daily yield of alcohol." The darker copper is due to a tin alloy in the metal. Rare. Circa 1750-1780. 7 1/2" tall x 8 1/2"D.