Medieval penny found at Richard III dig

Suspense author Jeremy Bates wanted to see the medieval silver penny that was found at the excavation in Leicester looking for the body of Richard III. Ask, and ye shall receive! This comes courtesy the University of Leicester. Not sure what the date is for this, I'm not much of a numismatist. This is the reverse side and looks like the pennies minted during the reign of Edward IV, who ruled during the troublesome War of the Roses, sitting on the throne twice from 1461-70 and again from 1471-83. The date certainly fits with Richard's burial in 1485. I could be wrong, though.