All the new states quarters dont have the date on the front anymore. It looks like it is hollowed out to be used as a trick coin. I even think I see where the piece was fasten that was a ferrous disc that was magnet would stick too. What is was was a penny or dime was put into the hollowed out area with the metal disc would also be so when it was laid down on a table the person with a magnet in his hand would pass it over the quarter and with the metal disc in it would pick up the qurater leaving the other coin there, so he changed the quarter into the dime, or penny as they will not stick to the magnet. The quarter with the metal disc would stick to the magnet.
I have a couple of pennys here that have a hollowed out area for a dime to be put into it I got in change in my bar.