Artist's View.
Experimental Model. Longer chassis (7 road-wheels per side). Armour - 100 mm. New 850 hp V-2SN engine with turbocharging. New diamond-shaped turret with 85 mm F-30 cannon.
The single prototype, constructed in 1941, was lost in battle after a direct hit to the frontal hull by a 150 mm howitzer sFH 18 in December 1941.