A well engineered partially complete 1in. scale model of an Aveling and Barford DX single horizontal cylinder petrol road roller of circa 1930 designed by E.T. Westbury with chassis, rolls, perch bracket, steering quadrant, fuel tank, brake lever, hopper cooled engine with crankshaft, camshaft, valves and twin disc flywheels, gear box and carburettor, unpainted. Built by D.F. Sheppard -- 22in. (56 cm) long. Drawings and literature