He keeps his surf board under his chair, perpendicular to our view plane, tilted between the legs. You are seeing the end of it lengthwise
I looked on that link you pmed me he other day and didn't find one exactly like it but there were many similar.
It certainly could be a new one, although if there isn't a doubled column to go along with it, they are usually too minor to list from what I have seen...
Hmm, I'm thinking that if it were a doubled die, it would be too minor to be listed as there is no additional doubling of the columns that I can see...