This old tractor used to belong to the Department of Agriculture, and as such has remarkably low hours for it's age. The previous owner treated the tractor quite poorly but it has stood up to the abuse well. Unlike the 411R, the 411Rb has a petrol engine. It is very well designed, with offset final drives, two range gearbox with 6 forward and two reverse gears.
Finding parts for this old beast is a challenge - the distributor has been replaced with an incorrect item that spins backwards therefore has no mechanical advance, making tuning a bit of a challenge. The old carburettor has seen better days and has been repaired as far as it can. I would like to replace these items eventually. The engine speed governor has been removed as the alternator had been replaced. I'd like to get a governor working on it again one day.
Apart from its foibles, it has been a trusty tractor and I have it running reliably nowadays.