Holt Mark II Self-Propelled Caterpillar Mount with a 155mm GPF gun

From Landships “The Mark II was designed to carry the 155mm GPF gun which was built under licence as the 155mm M1918. The GPF gun fired a 43kg projectile with a max. range of 15,700m. The gun was mounted on a short pedestal mount bolted to the chassis. The engine and transmission was positioned in the front of the chassis and the rear of the chassis was opened out to allow for the gun recoil. The driver's position was in the centre on the right side of the gun. A total of 10 Mark II SPGs were constructed.