Unboxed Mamod SP5 Twin Cylinder Stationary Engine, Tidy used example of what for over the years was for a lot of the time the largest and most powerful engine offered by Mamod.
This one looks fairly tidy and steams well, the boiler could benefit from a polish up but otherwise original unrestored, these have the reverser / throttle reg and has the solid fuel burner tray and sight glass, safety valve and whistle unscrew and tighten as they should do.