Comparing: Grille 15 vs. AMX 50 Foch (155)

In the summer of 1942, Waffenamt (the German Army Weapon Agency) concluded an agreement with the Krupp and Rheinmetall companies for designing a tank destroyer on the chassis of the Panther tank. It was planned to mount either the 128-mm K 43 gun or the 150-mm sFH 43 howitzer. The projects were designated Grille 12 and Grille 15, featured rear placement of the fighting compartment, and differed only in the artillery system type. Later, the Grille 15 received a 150-mm gun with a length of 63 calibers, which could penetrate 200 mm of armor at 4,000 meters. However, development was slow, and the Grille 15 remained only in blueprints.

In 1952, with the launch of the AMX 50 120 tank project, the French discontinued development of the AMX 50 Foch tank destroyer. A tank destroyer having the same 120-mm gun armament as the tank was thought to be unnecessary. There were attempts to upgrade the main gun to 155 mm, but these efforts were abandoned as France made moves to adopt standardized NATO equipment.