An approx 2in:1ft scale model of Hall's Rotary Engine, well engineered by G.A. Dimelow with horizontal cylinder approx 1¼in. bore with overhead valve, studded stuffing boxes, shaft governor and sprung loaded needle valve, pedestal mounted shaft bearing with oil cup and spoked flywheel, cast bed and wood plinth, finished in red, green and polished brightwork -- 7 x 10in. (17.8 x 25.5cm.)