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

I don't know much about these engines.  However, I don't believe that all of the stacks were painted to match the base.

This one has the matching stack.  It's a fancier slide-valve mode with the firebox door:

https://www.toyenginecollector.com/toys/tag/SS112


This oscillating cylinder model doesn't have a fancy stack and it's a very complete engine with box, instructions, etc, so I think the odds are quite good that the stack is original.

https://www.toyenginecollector.com/toys/tag/SS136


This YouTube video seems to be the same engine, but with a painted stack.