This is a muling combining the regular 1805 quarter obverse (Browning 2 dies), heavily rusted, with the infamous 1792 eagle on a half shield design used on JC1792-1-JC1792-2/P6001-P6005. It was struck by Montroville Dickeson probably in the early 1860s, the obversde die being sold by the mint as scrap. Only a single example is known ex Haseltine 4/1882, Metzger, Brand, Norweb, New Netherlands 9/53, Kagin 9/65, Bowers and Merena 1/94, Bowers and Merena 5/95, Heritage 9/97, Bowers and Merena 12/03. Photo courtesy of Bowers and Merena.