While it could be a circulation mark, it is unusual for those marks to make it all the way under the protected area of the door frame, and to maintain their strength the whole way across.
On the other hand, it's not completely level, and most DDR lines have at least one very straight edge. Could be a die dent. It's not unheard of for the mark to twist as the hub and die pop into the final position.


On the other hand, it's not completely level, and most DDR lines have at least one very straight edge. Could be a die dent. It's not unheard of for the mark to twist as the hub and die pop into the final position.


























