1970-S Proof Washington Quarter Struck on 1941 Canada Quarter NGC PF 65
This unique 1970-S Proof Quarter from the United States was over struck on a 1941 Quarter from Canada. This mint error was originally discovered in group of San Francisco Proof Errors that was auctioned by the State of California. There is a significant amount of detail on both sides showing the design of the Canadian Quarter. This is one of the most fascinating and intriguing proof mint errors ever discovered. Click here!