I did a lot of research and I was divided between Chloe and Loewe mainly because of the hardware--Loewe uses different hardwares on their bags, in fact they are almost unpredictable.
Kate's bag
Chloe fall 2008
My guest is Kate's bag is a Chloe pre-fall and I just might be right--look at the pictures above and compare the hardwares.
the more i see close-ups of it, the more i think it actually may just be a pleather/vinyl topshop bag or something similar. don't the seams and the material seem to pucker in a not-so-luxury way?