25 Cents - Elizabeth II Creativity Mule

The "Creativity" mule resulted from a production error at the Royal Canadian Mint in 2000, when the reverse die from the Millennium 25-cent series was inadvertently paired with the wrong obverse — producing a combination that was never officially authorized. The Millennium quarters were issued as a twelve-coin series, one for each month of 2000, which created an unusually large volume of reverse dies in circulation on the production floor, and apparently an unusual opportunity for mismatches.

Certified examples are scarce, with populations in major grading services remaining in the dozens.