CHANEL Black Caviar Gold Medium Double Flap Bag

how to know if a chanel bag is realCHANEL Black Caviar Medium Double Flap Bag 
Height: 6"Length: 10"
Depth: 2.75"Strap drop: 17"
2016-2017 Production date
Shows some light wear on the outer edges of the flap and on the bottom corners. Inside has some scratches. Comes with Chanel card and dust bag. See all photos.