This is a F-4W not the F-4E, as far as I know ESP never made this guitar as a production model. It is Walnut and heavy! Just beautiful too! 

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.