WWII German Luftwaffe Single Slip-On Board For Second Lieutenant in Administration Branch-The lower green color represents the branch color of the Luftwaffe Administrative Service. The black nebenfarbe (center color) was used during two separate periods. From October 1935 - September 1939, it was used to represent all Officials of the RLM. From July 1944 until the end of the war, the back nebenfarbed boards were used by Officials from the Construction and Technical Administrative Services. Overall the board shows light wear.