I cannot quite tell if the label is right. I *think* it is and the China tag is cloth, that is good. Does the bag have a tiny black with white numbered tag in a pocket side seam? It is hard to find and has a thread with kate spade in script you can just barely see with the naked eye. Compare your label to the ones on ihatecounterfeitbags.info. That site is really good!
I dont have the messanger bag but I do have a lot of other Kate Spade bags and the lables and material look similar. It looks authentic to me
It looks authentic to me.