COBI 2546 Armored Car IV Ausf.g Ein Middle German Tank Construction(559PCS)The Panzerkampfwagen IV (PzKpfw IV), commonly known as the Panzer IV, was a German medium tank developed in the late 1930s and used extensively during the Second World War. Its ordnance inventory designation was Sd. Kfz. 161. The Panzer IV was the most numerous German tank and the second most numerous German armored fighting vehicle of the Second World War, with some 8,500 built. Its chassis was also used as the base for many other fighting vehicles,