Description

The 17 pdr was the most effective anti-tank weapon in the British arsenal during World War Two; but mounting a gun of this size proved challenging for design engineers. While their subsequent work would later lead to the development of the Sherman Firefly and the Challenger series of tanks, the Ministry of Supply commissioned Vickers in July 1942 to develop a self-propelled version of the 17 pdr using the chassis of the Valentine tank.