PART III. Die Installation:

Mules: 

Two anvil dies

Definition: Mules are coins struck by mismatched dies.

The 1982 Jamaica cent shown below displays the obverse design on each face. Since Jamaica is a former British colony the obverse design was probably struck by the anvil die. The U.K. and its former colonies typically use the obverse die as the anvil die.

The obverse design on the Chilean 100 pesos bi-metallic coin shown below is carried by the anvil die.  One properly installed anvil die was paired with a second anvil die acting as the hammer die. Only one example of this mule is currently known.

The images below show a 1 EURO cent — country of origin and date unknown — that was struck with two reverse (anvil) dies.

Images are courtesy of Heritage Auctions.