Most so call "genuine" ones state they are genuine because they have the blue protective film on them...
Look at the pics of the back & they only have a part No. on them..no made where or date stamp or the VW or skoda or audi logos also & part numbers, or the manufacturers name, or the plastic type.
eg:- ITALIEN, 7M7 60 165, 7D0 601, Krallen >PC+ABS<, Scheibe >Al<, 10/14, LT2....all just on the back of one centre cap.