Not to be the dissenting opinion, but I think the bag itself (not the strap) may be authentic. I have the exact same season black city that came from BNY and the pictures of the actual bag you posted look fine to me. I do admit, it looks more wrinkly than what I'm used to seeing, but I've seen authentic bags like that. The back of the rivets have no notches, there is no leather along the inner pocket on the outside of the bag (the inner pocket on the inside of the bag does has a strip of leather) and the tag's font looks good, except mine has N 0119 A (which are different amoung bags anyway). Of course, you have to look and feel the bag irl to know for sure, but as far as those characteristics pointed out which deemed questionable, they're on an authentic s/s 05. I admit the strap isn't real but there are no pictures of the strap in the auction, so could that have been a replacement strap like a previous poster had mentioned?