As far as I know, it is just an ordinary car...the story I heard was that it was in storage since 1973 or 1983 according to the seller. It had been seized for unpaid rent and was stuck in a warehouse until last year when the current owner bought it. This is of course all per the current owner, no way to substantiate it. This is all I know. What exactly would a "mule" be? Would there be any way to tell by looking at the car that it was one? The serial number does look awfully short, didn't notice that before. And if it doesn't have an M and it should have one, then someone may have made up a clone and is trying to pass it off as the real thing. I should have said earlier that the PHS I have is a copy of the seller's copy. So I guess there could be funny business there...not that I'm starting rumors! Just suggesting it as a possibility...