I was wondering the same thing and I asked my SA at the Stockholm boutique. She was also confused about this so she brought out a couple of Deauvilles and both of us were surprised to notice that it was mixed. One that was on display had the t-bar and also some from the back, but then she brought some from the windows and they had the round plate. It was really strange.I would also like to know when they switched from T-Bar to the round toggle if anyone can help?