1965 25C Special Mint Set Washington Quarter -- Struck On A 5C Planchet -- MS63 ANACS. This exact coin is photographed on page 214 of Mike Byers' World's Greatest Mint Errors

Pricing & History
1965 25C Special Mint Set Washington Quarter -- Struck On A 5C Planchet -- MS63 ANACS. This exact coin is photographed on page 214 of Mike Byers' World's Greatest Mint Errors, where it is valued at $5,000. Grade: 63, Service: ANACS, Service No.: 5878, Issue Date: 1965, Denomination: 25C