I also linked to a later prototype at AmigaLove (maybe you missed it since the links were right next to each other - sorry for the confusion about that). From your photos, I would guess that your unit is newer than that one - the labels seem a little more professionally done and it has a slightly more realistic serial number.
Got any more pictures? The front of the case and the keyboard in particular will help to identify where the unit falls in the production history.
Do you still have any of the disks or documentation that came with it?
