A new one for my Sunday Best. I found it in one of Bill's Pelt cases and I had to do some pretty smooth talking before he would let me replace it with a Pelt - an Antifreeze no less!
And I still feel lucky - it's probably the first marble he's let go of in decades!
I think the easiest way to explain what I meant is to say this . . . make an "X" with your index fingers and imagine each finger is a seam on opposite sides of the marble.