User blog comment:*VampireGurl*/Pre-Order ‘Breaking Dawn’ Tie In Book with Edward, Bella and Renesmee Covers!/@comment-83.38.130.156-20120821211800/@comment-4400202-20120821212454

That's a nice question. I think it's the Cullen crest, but, in Alice's vision in New Moon she wore a ring with the Cullen crest on it. Not sure if it is Ed's wrist cuff, though.