The German heavy tank destroyer Panzerjäger Tiger (P) (Sd.Kfz. 184)
Ferdinand was based on the chassis of the Tiger (P) tank designed by
Ferdinand Porsche. The vehicle was not accepted by army, but because 90
chassis have already been produced at the Nibelungenwerke plant, it was
decided that they could be usefully developed. This is how the tank
destroyer based on the Tiger (P) chassis was born.