That is a Jagdpanzer IV/70 (V). The IV/70 means that it uses the Panzerkampfwagen IV chassis and is armed with the 75mm L/70 gun that was also used on the Panther medium tank. The (V) means that it was the design built by Vomag; the (A) version, built by Alkett, had a higher profile.
If it is marked "befehls", that means that it was a command variant of this vehicle and that it would have carried additional radio equipment and less ammunition in the fighting compartment.
