I believe it is damage too. Here is the real 1917 DDO 001 http://coppercoins.com/lincoln/diestate.php?date=1917&die_id=1917p1do001&die_state=mds
IMO it's not a DD but you can check the site @furryfrog02 gave you & this one: http://www.doubleddie.com/288601.html