This mint error is an 1851 Double Eagle struck on a large cent planchet. It has been listed in appendix B in all editions of Judd.
It is unique and is ex Woodin-1914 ANS exhibit, Newcomer, several Kosoff sales in the 1950s, Judd and was offered by Mike Byers in the 1970s. It is presently part of a private error collection.
Photo courtesy of Dave Camire.