That one is an A.G. Russell LE. It has the gold anodized Ti handle and a Damasteel blade. It was a run of either 100 or 250, I honestly don't remember.
The only production version I'm missing (that I am aware of) is a full Damasteel one (scales and blade of Damasteel). It was also an A.G. Russell LE with only 50 made (I think).
Other than that there are the prototypes, with the 312 being the rarest. Far as anyone knows there is only one in existence and a guy over at the BM forums has it. It looks like a 3100, but it's not auto. Seems like they were going to go that route before they decided to do the Red Class thing.
Love the Mites!