Looks like a '55. Always nice to have parts tractors. And for that price I'd buy as many as I could. A guy from another site ask me if I had a leveling arm for a RC. I recomended a couple of people who might so I don't know if he got it yet. If you want to sell yours send me a PM and I'll put you in touch.
The german baptist run their tires like that around here. When I questioned the practice I was told they do it on the on the road because it reduces the wear. Do not know if it is true but you do see alot of them running this way. They do not drive cars or trucks.