Got it - here is the link... that is odd
http://i952.photobucket.com/albums/ae9/WithmyLastBreath88/73DE47E9-FFD9-45B1-89B4-61D7E86BCB12-1485-000000987BFACF6E.jpg
Edit: I wonder if it was worldbuilding's way of marking different types of assets. Even so, that is kind of a cool catch!

I never noticed anything like that when I was playing through.