TT 12 CH Mle 56 Armored personnel carrier/Infantry fighting vehicle French Army, is one of the many variants of the French AMX-51(also AMX-13) light tank.
Also for short:
. AMX VTP ( Véhicule Transport de Personnel)
. AMX VCI ( Véhicule de Combat d’Infanterie)
“..The AMX VCI (Vehicule de Combat d’Infanterie) was originally developed in the early 1950s to meet the requirements of the French Army. The first prototype was completed in 1955 and the first production vehicles in 1957 at the Atelier de Construction Roanne (ARE). ..”