An original WWII German HJ/BDM sleeve diamond here. Some obvious staining is present and visible in photos. Looks to have been removed from a uniform. Displays well. 
 
The Hitler Youth (German: Hitlerjugend, often abbreviated as HJ) was the youth organization of the Nazi Party in Germany. From 1936 until 1945, it was the sole official boys' youth organization in Germany and it was partially a paramilitary organization. It was composed of the Hitler Youth proper for male youths aged 14 to 18, and the German Youngsters in the Hitler Youth (Deutsches Jungvolk in der Hitler Jugend or "DJ", also "DJV") for younger boys aged 10 to 14.