The boiler looks like a PM Research.
I don't know about the engine; although, it is very nice.
I thought the boiler was a Stuart 504.
I thought the boiler was a Stuart 504.
Correct, Boiler is Stuart 504 but engine (I guess) is scratch build.
It sure is a good working unit. Arnold
Yes.... A 504 and a scratch built engine rigged to work with a flywheel and 4 pulleys to accommodate round belts and flat belts.
Gil