When I was 15, a friend gave me this steam engine. It looks like the Stuart oscillating engine, although he got it from Octura, in Chicago, at the time. I still have it and it is my first.
Brad, your First engine reminds me Very much of 2 casting kits on eBay right now. The first pic has similar frame but flywheel is larger...second photo is small flywheel but frame is very different. Your model seems much better castings.