From examining the style bag was made – whether it was made again after original production or was reissued, to the location where it was manufactured, and even the use of authentication services like Luxury Designer Authentication Services, you can still find out if it truly a supposed vintage Coach bag is genuine of the repute. In such a case, there are other ways you can tell for a Vintage Coach bag. One of them is the possibility of the bag being a vintage style. There are many conditions for this as explained in my recent post HERE. You may come across an authentic Coach bag that has no serial number. What if the Coach bag is without serial Numbers? Are vintage Coach bags still in trend in 2022?.Can I know how much my Coach Bag is worth using the serial number?.4. Use the internet/ web shopping sites.3. Find out on the official Coach Website.Other ways to identify a genuine vintage coach bag.What if the Coach bag is without serial Numbers?.