Here are a few shots taken circa 1963 at the grounds of the Rough and Tumble Engineers Historical Association in Kinzers, Pennsylvania.
This is a museum along Route 30 near Lancaster. In August each year there is a special weekend - the Threshermens' Reunion - where
enthusiasts trailer in these iron monsters and fire them up. The museum has other stationary engines and equipment on display.
Check out http://www.roughandtumble.org for current information.