Sorry if I did not explain well. Think of an airplane crashing in the mountains, the plane hits the top of a mountain then hits more mountain tops before stopping. Looking down at the crash from the sky you would see the plane skid marks from mountain top to mountain top but the plane never went down to the valley.The scratch on your coin did the same thing, it never went down in the A only on the field part not the valley part. the letter A is sunk in like a valley.