Wilesco D21 Steam EngineWilesco D 21 steam engine with mirror polished brass boiler, diameter 2. 6 in, length 6. 5 in, boiler capacity 30. 5 in, with water gauge glass, water drain cock. Boiler house true to life, colored, with embossed brick type walls, 2 footbridges with railing and 2 ladders. Double action reversible brass cylinder with flywheel, spring loaded safety valve, additional steam whistle with chain, pressure gauge, steam regulator, flywheel of 3. 9 in diameter