Early 20th-century Doll & Co. (Nuremberg, Germany) model twin-cylinder horizontal mill engine, an industrial-era miniature of farm/factory power units. Painted iron construction with nickel-plated guard rail, belt-operated ball governor, and finely made brass/steel components, mounted on a shaped patinated wood base for display. Recently cleaned and oiled for crisp function. Approx. 8 pounds; 165 x 280 x 203 mm (6.5 x 11 x 8 inches). Highly collectible “gentleman’s model” with strong mechanical presence. The overall condition of this Doll & Co. scale engine is excellent. Beside the little normal wear, there is no damage and all parts are secured in their settings. This piece has been carefully inspected to guarantee the condition and authenticity.