Any incuse mark on a die will leave a raised area on the coins struck. Note closer on this area it show flow lines on the fields and over that area. That tells me it was on the die for quite sometime. It maybe that the die was damaged as the '6' moves away from that area. So a contact on the die, a mark/gouge, may have damaged the die?
@John1- You were correct. This isn't a rpm and thanks again for the gouge evaluation. @SilverCents- Thanks for the reply. @coop- As always a detailed explanation of what's going on with a coin. Much appreciated. You guys are great.