The Bantam (Bofors ANti-TAnk Missile) or Robot 53 (Rb 53) was a Swedish wire-guided, manual command to line of sight, anti-tank missile developed in the late 1950s by Bofors, in which organization, it was mounted on Steyr-Daimler-Puch Haflinger, a small, lightweight, four wheel drive, high mobility vehicle about 3.5 m long and 1.5 m wide, powered by a 643 cc flat twin horizontally opposed, rear mounted, air-cooled engine?