I think I may have found one but I can't get a picture of it for anything. I'm just going to bring it to the lcs and have them look at it. If it is legit (not holding my breath) it'd be my first error find which is cool.
From a book I own. The first image that was googled above is the same. Notice the light tilt. Here I inverted the page to show what the "normal" shape and position of this should have looked like.
i can see a slight tilt in mine and it looks like the ball is on top like that but it is a little worn so its kind of hard to tell.