The bag does look authentic although I can't say for sure. Why don't you try putting in the item number from
the creed (leather license plate in the bag) in this drilldown area. You will need to remove or backspace out the item number presently in the drilldown such as 5078 and put in your number. If the bag comes up it will be authentic. Another sign is that Coach only puts signature lining in their non -signature bags which is what they have done with the bag you are trying to authenticate. We used to have an authenticate this sticky but I am not sure where it has been moved.
I'd stay away as the lining on the inside is signature. I'm no expert though. ETA check out our authentication thread located in the coach shopping forum.
Some bags do have the signature lining, (a signature bag will never have a signature lining however). This looks authentic to me as well, however, the one thing that looks strange is the hangtag seems huge! I would try the drilldown process as well.