That is an interesting tractor. It might be an Irish Model N. I've never seen that lettering on the gas tank before. The dash appears to be home-made welded up from plates. (I wonder why, the real item is not that difficult to find.) The steering gear looks like it came from an E27N. The steering column would have enclosed the shaft. By the way, the serial number is not where you showed the scraped-off paint. It is on the otherside just below the head gasket toward the front of the engine.
The parking brake appears to be an accessory, but it may have been used on the Industrial models, since that seemed to be required in the British Isles. If it is an industrial model, that explains the lack of fenders. The agricultural models had fenders and floor pans to protect the owner-operator from dust. They seem less concerned about that for industrial use, especially when only hired hands did the driving. If it is an industrial, the rear axle speed ratio will be for high speeds. Industrial also could have had head-lites installed. Also, Industrial tractors did not use the water washer air cleaner, which would be located just in front of the dash.
Your tires and spoke wheels are worth a considerable sum. They could be Electric Wheel, or F & H. Some industrials had hard rubber wheels, but I imagine pneumatic tires were added as soon as available. For agricultural tractors, steel lug wheels were standard for a few more years.