This is being reported as an engineering sample of Apple’s next-generation iPhone.
UK based KitGuru claims the images show an “early iPhone 5,” Cult of Mac says that the device looks more like an engineering model assembled for the purposes of designing and building protective cases. The unit pictured still has a look similar to iPhone hardware leaked in images and on video in the past, but the images also show hardware that is thinner than the current iPhone 4S and iPhone 4 (maybe up to 20% thinner). A smaller dock connector and a taller design can also be seen in the pic, beyond that its up to you to imagine what`s going on hardware wise in that case.
Expect the new iPhone to be out sometime in the fall.