Textbook aluminium Erkennungsmarke marked 2./J.E.B.6 indicating Infanterie Ersatz Battallon 6 which was moved from Lübeck to the Netherlands in september 1944 where it was added to Grenadier Regiment 1225. This unit fought in the Reichswald, Venlo, Straelen, Geldern, Issum and Wesel. After these battles it was once again moved to the Netherlands in the area between Utrecht and Hilversum. It fought at Zutphen, Vreden and Borken. It was destroyed in the Ruhrkessel and went into US captivity. A nice Erkennungsmarke with a good base for further research!