14. Die shift
This error shows a doubling that occurs while striking.
When a die is slack, the striking process is functional, but the die is twisted horizontally at the end of the strike. When he goes back up, the die release the twist and push the metal on the side and upward. This type of doubling is especially visible on the letters and numbers, but occasionally on the drawings. When an employee's quality control realizes this, he only tighten the part of the machine that holds the die.