In November 1944, the Krupp company presented several avant-projects aimed at upgrading the armament of tanks and tank destroyers in service. Among them there was a project for mounting the Panther's Schmalturm turret on the Pz IV Ausf. J. The project was not considered as it would overload the suspension and production of the Pz IV was being phased out.
Marks of Excellence requirements for Pz. IV S.: beta