German WWII Single Slip-on Shoulder Board for Luftwaffe Flak Troops

German WWII Single Slip-on Shoulder Board for Luftwaffe Flak Troops-This single shoulder board has the red piping which is very desirable. It's an early example as the tresse is in a brighter bullion. This is for the rank of Unteroffizier. The tab is Luftwaffe gray wool, and does have a portion of paper tag pasted to the tab. This might have been pasted into a scrapbook, we are uncertain.