Ah...I don't have a picture of the exact one in D.Gray-man, but I do know that the majority of the markings are the same as the one they have here...http://www.geocities.com/Athens/2092/rosecr.gif
Chapter six, page two has a decently sized picture of it...the details are not perfectly clear, though, but the basic design is there. That diagram above can help clear things up for you...
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http://www.onemanga.com/D.Gray-Man/6/02/
I don't even belong to this community. o_o