I did a bit more research into this shock, and its very rare indeed. It only came OEM on two bikes, the Intense M1 and the Stab Primo. Here is the link to the tech manuals if you want to have it rebuilt. 2003 model year. http://www.foxracingshox.com/fox_tech_center/manuals.htm

That's correct, it came on the 2003 Kona Stab Primo. Fox still has the tech manual on their website. It's NOT a prototype, its an OEM shock, and is the predesesor to the DHX. Do a Google search for "Fox Vanillia DH", the first thing that comes up is the tech manual.

Has that been repainted? The frame almost looks new!

That is the Syncros FBI headset. http://www.syncros.com/headsets.htm