I'll link similar ones for you, both 5 series but different colors. I can't tell if your chain is resin or not, maybe you can ask the seller?
This is an authentic CHANEL Vintage Lambskin Medium Single Flap with a Bekko Resin Chain in Beige. This vintage shoulder bag is beautifully crafted of beige diamond stitched lambskin leather. The bag features a Bekko resin chain link shoulder strap threaded with beige leather and a frontal flap...
www.fashionphile.com
This is an authentic CHANEL Vintage Lambskin Medium Flap with a Bekko Resin Chain in White. This vintage shoulder bag is beautifully crafted of white diamond stitched lambskin leather. The bag features a Bekko resin chain link shoulder strap threaded with white leather and a frontal flap with...
www.fashionphile.com