These new photos referred to as the “035 mockup” are alleged to hail from around 2002 to 2004, according to Apple’s senior vice president of design Jonathan Ives:
My recollection of first seeing it is very hazy, but it was, I’m guessing, sometime between 2002 and 2004, some but it was I remember seeing this and perhaps models similar to this when we were first exploring tablet designs that ultimately became the iPad.
As you can see, the basic shape of unibody design was present from the start, even with the black bezel that Apple so adamantly claims is a patented design. The 30-pin port is also present, but a Home button is noticeably absent. Obviously, the prototype shows a much thicker device, but remember, this was 2002 and batteries weren’t as shapeable as they are today.
Click the pic to see more.