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

Built with four screw cylinders!

But it is such a late model otherwise, I have to wonder if that was done by Jensen or ...... ?

Whatever the story may be, that is one very cool difference, and should make for one very powerful steam plant!!!

Yes! Good eye!
I was told by the seller that his father bought the engine new. So I am assuming it came from Jensen Mfg that way.
The thing is, you can’t just steal two four screw cylinders from a couple 25 models and put them on a 55. One of the cylinders has to be a mirror image of the other one.