A World War II German Luftwaffe Greatcoat Luftwaffe Flak artillery Oberleutnant's greatcoat. Other Notes: The greatcoat was an essential uniform item worn by all ranks, with minor variations, and followed the basic design of the Imperial German army's greatcoat. The Luftwaffe version of the greatcoat was first introduced by the Luftwaffe on its inception in March 1935. During the war the standard issue greatcoat underwent a few minor modifications. On October 17TH 1942 the Luftwaffe introduced the universal greatcoat that was intended to replace both the standard greatcoat and the surcoat but the changeover was never complete and the standard greatcoat was worn throughout the war. Officer and certain senior NCO ranks were responsible for purchasing their own uniforms and as a result were allotted a clothing allowance through the Luftwaffe's Kliederkasse (Air-Force Clothing Account) system. The Officers and certain senior NCO's could choose to purchase their uniforms from the armed forces clothing depots