PS Vita Prototype DEM-3000XXX (First DevKit)
This particular device is the 84th iteration of the hundred Vita iterations (Prototypes) built during the system development. All the Prototypes got destroyed immediately after the final design was picked by the management. Also, as a devkit supports SD Cards instead of the known PS Vita Game cards, has a built in Mini-B USB port and a HDMI port with 720p output.
Luckily it survived and now we know that this piece of hardware exists and how it looks like!
Post on AssemblerGames (Photos used in this video with the owner’s written permission): http://www.assemblergames.com/forums/showthread.php?47699-PS-Vita-Prototype-DEM-3000H84Permission has been given from the owner to use the following photos on this post and video.