It might be a Dorcelle as discussed in this thread. I think I came across a bag like this when I did a Google search for Dorcelle after the discussion.
http://forum.purseblog.com/coach-shopping/authenticate-this-coach-694619-731.html
I ran across a dorcelle almost at the same time as you did, but they were marked dorcelle, this one seems to have no markings in the bag. The lack of inner pocket is interesting too...