That is authentic; there are far too many features that would have to be imitated and the counterfeits are looking for a quick buck selling easier to make garbage.
As for patent crinkles, that appears to be the new style for patent. I looked at a Kennedy bag the the patent is crinkly. Perhaps that make it more durable; don't know, but I have seen current patent trim be pretty crinkly.
Thanks for the info Marissk!