An unusual brass and steel gas fired stationary steam set comprising a brass vertical firetube boiler with normal fittings, (some parts missing) and main steam line with shut-off valve to two regulator valves to twin cylinder horizontal engine, one cylinder embossed 'Clyde Model Dockyard' with piston valves, valve chest lubricators, studded stuffing boxes, bar type crosshead guides and three bearing crankshaft with twin flywheels. Further details include gas burner, oil seperator tank and metal engine bed mounted on eight turned columns. Wood base. --19 x 24in (48.2 x 61cm).