Luftwaffe Beer Stein

I hope this is the correct forum since I could not find the right place to post this. I would like to purchase this and have only the pictures attached.

I could use your help and opinion on this Luftwaffe Stein.
Does anybody know anything about what this is?
Is this an authentic WWII item?
Does anybody want to venture on a value?
Your opinion and help is very much appreciated! Thank you! JME

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