Hi, it's authentic.
PS has changed the design with/without the button a couple of times, for spring 2012 the wallets looked like the one in the auction. See our reference thread here: http://forum.purseblog.com/proenza-schouler-reference-library/proenza-schouler-slg-small-leather-goods-reference-thread-673221-2.html#post21654005
Wow thanks for the quick reply! Thank you
