While I'm flattered that the seller quoted the Guide that I wrote for Salearea, I'm not comfortable with one of the details on that bag. The seller is right about pre-1994 creeds not including the serial numbers, BTW - I suggest you readthos eGuides yourself:
http://search.reviews.ebay.com/members/salearea?uqt=g
And the oldest that bag could be is 1993 so no, it's not super-duper thick leather.
The leather part of the turnlock tab assembly isn't right. Not only is the color obviously different, but the part sewn to the front flap should be padded and "pillowed" above the turnlock and it's not. It's possible that piece was replaced but it wasn't replaced by the correct tab so either it was a repair done by someone other than
Coach, or it was a sloppy repair job by Coach themselves.
Either way, it may be genuine but it's definitely not in original condition.