The Dollar Project: First Strike
As the horizontal press begins to mint coins, you notice that the coins are ejected from the machine into a big metal box. All of the coins look the same and there is a worker who inspects the coins. It is up to the worker to make sure that the coins are uniform. The goal is to make sure the coins look identical no matter in which stage of the die run the coins are produced. Dies eventually break or wear out. Worn dies are replaced. When a set of new dies is used to strike coins, only the very first coin produced is called a First Strike.