Up for sale is a unique 2016-P Harpers Ferry Quarter with a Double-Die on the "P" Mintmark. This coin has circulated and is an America the Beautiful Quarter with a denomination of 25C. The coin is ungraded and uncertified but features an error that makes it one-of-a-kind. The strike type is business and the mint location is Philadelphia. This coin is a must-have for any collector of error coins.