PART III. Die Installation Errors:

Mules: 

Wrong hammer and anvil die

Definition: Mules are coins struck by mismatched dies. In this case both hammer and anvil dies were not correct.

This Malaysian mule would be classified as a “double mule” It was struck by a 1 sen obverse die and a 1 sen reverse die installed in a 10 sen press. The coin was struck on a copper-nickel 10 sen planchet inside a 10 sen collar and shows the reeded edge normal for the 10 sen denomination (the 1 sen coin has a smooth edge).