Question about the Zvezda pz iv ausf g

Armor/AFV WWII Axis
1

Hello,

Does anyone know if the Zvezda pz iv ausf g is supposed to be built by:
A) Krupp
B) Nibelungwerk
C) Vomag
D) other?

Also, how accurate a representation is it of the ausf g by whichever of its manufacturers?

Thanks in advance

Matthew