I'll follow that up with a K. J. Miller SE-100 Junior Engineer shown in the third configuration, that of a simple horizontal, but to make it more interesting I'll pair it with a small airbrush compressor to supply the air to power it.
The thing that makes this interesting is that the air compressor shown here is a K. J. Miller model 1000, which isn't really rare either, but is certainly not often seen, and is made by the same company as the steam engine.
It is very interesting and often seen, that rotational objects are not seen at the speed they are really going, and frequently are even seen to be turning in the opposite direction of their actual rotation, as is the case with the compressor's flywheel in this video.