Just was reviewing old posts on Fuchs wheels.....I am still new to this "original" early 911 scenario, and noticed a post by PWD...must all orig Fuchs show 6J or 7J on backside?.....as I recall, the Fuchs I have a deposit on only showed 15 x 6...does this confirm they are not orig and not forged? backside is so dirty I did not notice any other numbers......was planning on picking them up tonite.....don't want repro's for sure....pls advise. TIA