A model spirit fired stationary steam set built by J. Unwin circa 1920 with riveted brass mahogany lagged vertical fire tube boiler with water and pressure gauges, safety and clack valves, level test and drain cocks and steam line to Stuart S 50 mill engine with disc crank and spoked flywheel and hand feed pump, mounted on wood -- 13 x 16in. (33 x 40.5cm.). Carrying box