PART VI. Striking Errors:

Multiple Strikes:

Numerous Closely-spaced Strikes

Definition: This error occurs when a newly-struck coin fails to properly eject from the striking chamber and is struck several more times by the same die pair. A multi-struck error of this nature can occur inside or outside of the collar.

This 2000P Sacagawea dollar coin was struck 6 times. The first strike appeared to be normal, while the remaining five strikes were delivered off-center.  The coin moved slightly between each off-center strike.

Images are courtesy of Heritage Auctions.