On display in the Kalemegdan fortress, the tank is one of the few surviving TK and TKS type tanks. It probably belongs to the small TKF series, i.e. a TK model equipped with a FIAT engine. It is unfortunately impossible to reconstruct the exact history of this tank, but there is a hypothesis that it arrived in Hungary in September 1939 with the 10th Cavalry Brigade, and was later used by the Hungarian army in battles against Yugoslav partisans. A photograph from September 1939 has been preserved in Hungarian collections showing Colonel Maczek's interned soldiers with, among others, two TKF tanks. It is possible that one of them is the Belgrade model preserved to this day.

There is also an assumption that this tank may have belonged to a group of a dozen or so vehicles given by the Germans to Croatian units, also fighting against the Yugoslav partisans.

Of all the known TK and TKS tanks preserved to this day, it is in the best condition. It has all the armour and running gear, while the interior equipment (including the engine) and identification markings are missing. A TKS exhibited in the Tank Museum in Kubinka near Moscow is still in a comparable state of preservation.