The bag on the left is fake, on the right is authentic. Coach bags with signature patterns on the outside should have a solid/plain interior lining or a Coach lozenge logo lining, not a C pattern lining again. Exceptions to this rule are 2 styles of the signature “wave” patterns that also have a signature C lining. Vintage 90's Coach Scooter Sidepack Bag . Authentic Style 9893 . Rare Blue Leather Purse . Made in the USA . Timeless Fashion LuxeStarling 5 out of 5 stars (254) $ 62.00 Coach bags are stitched, not glued, and have YKK zippers. Coach C's are designed a certain way, so a misshapen C is a telltale sign of a fake bag. Watch for plastic wrapping around the handles without paper underneath and a price tag hanging from a ball chain, both of which indicate that the bag is not an authentic Coach bag.