Way back in 1976 I received this lovely Chanel bag as a gift by my then-husband. I've lately been trying to research its value, and I know it's authentic because way-back-when I had the original store receipt. I must have also had a registration card but over the years and many household moves it disappeared. I don't see a registration number inside it, and I know it's authentic, but is there another way to prove authenticity if I were to sell it? Also curious to know about the style; I don't see anything like it with the vertical stitching. Thanks for the help!