This is an engine that I assembled from a kit. I never ran it much and it is still fairly stiff, needing a good running in. It has the Regner gas-filler valve. The engine has a water glass, pressure gauge, and safety valve. The steam pump on the RH side is actually the adjustable displacement lubricator. It is gas fired, with a single-flue boiler. The Allen straight-link valve gear is controlled by a lever in the cab. There are dual eccentrics on the rear crank pins (similar to Stephenson’s).