The Panzer III/IV was a medium tank that was meant to combine parts of the Panzer III and Panzer IV. A proposal was made to put a Schmalturm turret on it.
Name: Panzer III/IV
Type: Medium Tank
-75 mm KwK 40 L/48 OR
-75 mm KwK 42 L/70 (in Schmalturm turret)
120 mm Front (150 mm Gun Shield)
80 mm Side