Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

I would agree that yours was originally built just the way it is, especially since the newer style hollow screw boilers have different hole locations on top than the earlier designs with solid screws. It was also most likely assembled post war with the firebox having the heater retaining screw holes. I believe it is precisely as it came from the factory. Furthermore the steam line lines up perfectly with the dome location on top of the boiler. If you substitute a newer boiler for pre-war you must bend the steam line or move the firebox, neither of which are done here. Mike, you have a very rare Big Power Plant!

Regarding the commutator.... they appeared like that before the later bases with mounting tabs appeared. One of mine has mounting screws through the base and the screws holding the comutator parts in place.

Gil