German military identification tag from World War  

This appears to be a German military identification tag (Erkennungsmarke) from World War II. The text on the tag reads:

• "Richard D. Leu" (likely the soldier's name)
• "Geb. Münde 4. 9. 94" (born in Münde, September 4, 1894)

I have not done any research, I hope this will become the subject of your desires.