The Diamond T 981 Prime Mover was a tank transporter system used in World War II and into the 1950s, consisting of a 12-ton 6x4 M20 Diamond T Model 980 truck and companion 12-wheel M9 trailer. The system was powered by a Hercules DFXE diesel engine with 201 hp (150 kW) and geared very low, it could pull a trailer of up to 115,000 lb (52,000 kg).
The Muckleburgh Military Collection can be found on the former Royal Artillery Anti-Aircraft training camp at Weybourne on the North Norfolk coast. It was opened to the public in 1988 and is one of the largest privately owned military Museum in the UK. Most of its range of tanks and armoured vehicles are maintained and still in working condition.