Note how they flow behind the devices? They are die scratches on the fields of the die. (incuse) When the coin is struck the lines are not of top of the devices, as the devices are deep into the die and the scratches could affect that area. Probably movement of the die on the surface of the table, or damage while in the machine. Not a plus for the coin. Just a common event. (The knowledge if the premium for this. The next time you see it on a coin, you will remember your question that I answered here)