Next-generation iPhone photos leaked online?

New photos supposedly showing the back casing of the next-generation iPhone have been posted online. Mac Rumors claims that the images originate from China, showing a matte-black 16GB iPhone back casing, carrying the previously unused model number A1303. Apart from the matte black surface and what appears to be a white Apple logo, the backing is quite similar to that of the iPhone 3G in both the location of the holes and interior layout. Previous pre-announcement leaks of iPhone casings have been surprisingly accurate, however, it remains unclear whether this will actually be the rear shell of a next-generation device.