Part of the allure of the 2.55 is the famous and much imitated chain and leather straps.
The chain on vintage classic bags contained a link without the leather threaded through it, see the image below. Our replica chain strap below doesn’t have the link without the leather threaded through it. This is how more contemporary Chanel chain straps are made. The leather straps on both vintage and contemporary classic bags are woven through each link then folded back on themselves and stitched.
Manufacturing techniques change over time. There is nothing wrong with either method but as you can see vintage Chanel straps are different. A nice little factoid to mention over a coffee with your fashionista friends!