I have some Lincolns that I've had for a long time that now have a weird look to them that I don't remember seeing before. I just saw this auction on eBay for a Lincoln that he's advertising as "crusty"--and looks exactly like a few of mine look. Does anyone know what caused this? http://www.ebay.com/itm/1934-D-LINC...125706?hash=item2119e1710a:g:IkEAAOSwFEFXI~DG