Found this one for sale recently but I wasn't 100% sure about this one so I didn't buy it. The Erkennungsmarke translates:

Gesch�tz Batterie, Leichte Ausbildungs Ersatz und Aufkl�rungs Abteilung 102

I'm not sure if the Germans used the "&" symbol on their dog tags. Has anyone seen this symbol before on an Erkennungsmarke?

ekm unkn1 res.jpg (57.2 KB, 114 downloads)
Die Treue ist das Mark der Ehre!