well theres I think 2 companies that made bricks,, MFC which is the lighter one and Akro which looks like burnt blood,, or visa versa,, when you actually hold one in hand theres no mistaken that you will say "thats oxblood" cause they look just like a big old glob of dried blood, i have a few that do not have the "9" design in them, but that "9" you see is a bonus in my book,, very cool marble,,lolol,,that yellow one isnt oxblood that was just in the picture i saved, no one can say for sure where that swirled oxblood comes from, yet,,,,,bj