A nicely made DeWinton style vertical boiler locomotive, of narrow gauge proportion so a good size in 5 inch gauge - it runs well and makes steam like it's going out of fashion, there's a clip of it here.
Silver soldered copper boiler, 80psi working pressure, feed by injector and axle pump with auxiliary hand pump. Vertical twin engine with cast iron cylinders, slide valves actuated by Joy gear with pole reverser. Mechanical lubricator.
Length 27 inches