From the Spring/Summer Act II 2016 Collection. Black aged calfskin Chanel Casual Rock backpack with antiqued silver-tone hardware, quilted detail, flat top handle, dual shoulder straps, four exterior zip pockets, tonal grosgrain lining, single zip pocket at interior wall and snap closures at front flap. Serial number reads 22487981. Shop authentic designer handbags by Chanel at The RealReal.