That bass clef looks like the letter "C," but I'm not sure that it is properly called a "C Clef." It's been too many years since I took music classes, but I seem to remember that it's called an F Clef. I may be wrong, but I'm posting this anyway; somebody will certainly correct me if necessary. Regardless of the proper name, it does look cool and certainly denotes bass-ness.

I do know that the familiar treble-register clef is the G Clef.

JohnInKansas: Are you sure that thing is a washtub bass? It looks suspiciously like a beer keg to me...