EKM's Gross Rosen & Auschwitz ideas?

[HxC]

Hello all, i have a chance of buying 2 EKM's from a collector. He has a lot of original stuff, but EKM's is a market on it's own. He has these for several years and recently found them back and is willing to let them go (maybe, he's not quite sure yet..). I only collect orignal items, and i know there are a lottttt more fakes out there than originals (if there even are?). I hope i can find someone who knows where to look for and who can help me decide. what are the + 's en de -'s on these tags. critics, don't hold back, these are not mine yet, so i would love to hear all opinions!

[mr.dogtag]

There is a fair chance the Gross Rosen tag is ok.
When it comes to Auschwitz - it's a fake.
Rgds
Al

[HxC]

thank you very much sir, your help is much appreciated. I had the same idea. I find almost no discs to compare, so for me its very difficult. does anybody know how a genuine auschwitz disc looks like?
greetings!