This is a very rare Chanel backpack from 2010 fall/winter, designed by Karl Largerfeld .
The 3 in 1 design meaning it can be worn in 3 different ways.

The design features two detachable bags, fastened via snap buttons onto a faux fur panel that functions as the backpack base with integrated shoulder straps.
What’s more interesting is there’s a metal hardware holding a name card fitted on the faux fur panel.
Please see runway pics for size references.