My old guy Zebo, at the bridge, was a gray and black tabby. He had a very wide black stripe down his back. He was also a very large cat. My mom used to say that when he was on the kitty assembly line getting his stripes painted on, they got tired and just finished up with a big swipe down his back!

But, seriously, I have noticed that about callies and torties, mostly torties. I had a tortie point with one side of her face like any other siamese and the other side all speckled like a tortie, and it was a perfect line. I call them "half-and-half faces".