Rumely Oil Pull Tractor
You can see this extraordinary old tractor in action in my video of the Cumbria Steam Gathering: https://www.youtube.com/watch?v=PdpqXK3WWkA
The Rumely Oil Pull was a line of farm tractors developed by the Advance-Rumely Company of Indiana from 1910 to 1930. Most were very large tractors powered by kerosene-burning engines. The engine was designed to burn all kerosene grades at any load.
A popular model, the Type F, had a single cylinder of 10" bore and a 12" stroke. It was started by the operator stepping out of the cab via the large iron rear wheel, climbing onto the flywheel and using his bodyweight to get it turning, then quickly rushing back into the cab to adjust the choke and try to keep the engine running.