The builder and date for this miniature flash steam engine are unknown. All of the castings are iron and have numbers cast on them indicating it might have been built from a kit; however, there is no known information available on the engine. It has a water pump that kept water flowing to the flash boiler, an oil pump that injected oil in with the steam, and a lever in the back to engage or disengage the propeller drive shaft. It has a bore and stroke of 1 inch and a single valve driven by an eccentric behind the flywheel that controls both intake and exhaust. The pressure relief key on the top of the cylinder is removed once the engine is in operation.
