Two Panzertruppen of the Schwere-Abteilung 216 standing next to an Sturmpanzer IV (Sd.Kfz.166) early production, outfitted with Schürzen side-skirts. As can be witnessed by the whole in the sheet metal section, and not even a gouge in the armor of the “Stupa”*. The armor acted as a buffer for hollow charge shells, the outer armor sheeting plates hits the charger of the shell before it can hit the hull plates.
*The nickname Brummbr is actually an Allied created moniker, the men of the German Panzertruppen called them ‘Stupa’.