It 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.

The PB-401 was introduced in 2009 and was built from 2009-2010. It was never available in Flamed Maple, the finishes available were Pearl White, Black and Gold. This is a very sharp looking guitar. On the back of the neck near where it meets the body there is a haze in the finish. It almost looks like minor scratches that we see sometimes from where it lays in the box if a foam bag is not used. I am not sure if it will polish out or if it is actually in the finish.