The Diamond T was initially a marque of touring car (Automobile) with (models up to 70 hp were available). The company later became known for its trucks. During World War 2, Diamond T produced a classic heavy truck in the model 980/981, a prime mover (tractor unit) which was quickly snapped up by the British Purchasing Commission for duty as a tank transporter tractor. Coupled with a Rogers trailer, the Diamond T gave sterling service with the British Army in North Africa, where its power and rugged construction allowed the rescue of damaged tanks in the most demanding of conditions.