For fun and possible frustration (?)

Frustration for those who want to know but don't, perhaps.  What is this?:

Now, I wasn't interested in this but the much older equipment that was steam powered.  I just thought the Pulponauts here on LAF would like to see this little beauty.  And, why, if properly tempted and given adequate time, I might be able to post additional shots of 'cool stuff'.