50D (1953-1958)
The 50 D was based on the 6-cylinder 50 bhp power unit developed for a track-laying tractor. A rugged, heavy machine, it was ideally suited to towing operations and featured a 4-speed PTO unit. It was unique amongst David Brown tractors in having a side mounted belt pulley instead of the more familiar rear mounted unit. The 50D was the first David Brown tractor to be available only with a diesel engine.