This 4x4 truck was also in Bulgarian Royal Army's inventory.
Neither numbers, nor chain of supply are known.
Most probably, the A types were purchased via the domestic distributor of Adam Opel AG- a well known and frequently used way to circumvent German unwilingness to supply its then ally with vehicles, that were in high demand by the Wehrmacht.
I will model an A type, delivering "Czech hedgehogs" for a hastily formed AT defense line during Spring Awakening in Hungary,March 1945.
