I'm hoping that Starry will check in on this post because she's very good with Sabrina bags, but I feel the need to comment again.
One thing you haven't done is post the listing. Listings are important because a seller's listing, other items, history and feedback offer a wealth of information that pictures by themselves don't show.
You've posted many pictures and I don't know how many other opinions you've received but I know I've already responded at least twice that the bag looks fine and I see absolutely nothing that indicates that it's fake.
What bothers me is that you keep posting more pictures, trying to force a change of opinion. Personally, if I received a bag that I bought expecting it to be authentic and questioned it, I'd be absolutely ECSTATIC to get confirmation that I got what I paid for.
But in this case, your first statement (bold-faced in red above) tells me that you've already made up your mind that the bag is fake and you want confirmation.
You won't get it from me because I don't believe that you got a fake.
Understand that you are comparing this bag to another bag that you have but even though they may be the same style number, they may have been made in different months, years and factories.
Thus, even though the style is the same, the hardware, leather, creed fonts, etc., might differ. That doesn't mean that one is fake and the other isn't.
And leather, being a natural product is going to differ slightly from cow to cow. Some leathers might be slightly stiffer than another, but again, it doesn't mean that it's fake.
From what I can see, you got an authentic bag and at this point, I sure hope you haven't accused the seller of sending you a fake. (Buyers should NEVER accuse a seller unless and until such time that a bag has been confirmed as fake.)
I do hope someone else will chime in with another opinion.
Legacy ... just want to verify .. that lining makes me nervous