ESP never produced this model as a production guitar. They made this guitar in a 4 and a 5 string but the 6 string was never made. This is the sample/prototype for the 6 string version. I know of 3 of these, I sold a black one last month, this one and a Stained Brown one which I also have. 

This is a sample/preproduction guitar. ESP makes the samples to test out various colors, finishes and to show to dealers prior to the actual model being
built. They take them to shows like NAMM and start taking preorders for the new years model. Some Samples are never make it into production models.

This ESP LTD B-336 is in real good shape with the exception of a small chip near the battery door on the back. The chip is not deep and I am sure it could easily be sanded a bit and restained or just left alone.